Nyssa

Nyssa — formally Nyssa of Traken or Nyssa, Daughter of Tremas and, on occasion, Nyssa Traken — was a companion of the Fourth and Fifth Doctors.

A genius scientist, Nyssa assisted the Doctor in their fourth incarnation before joining him, Adric and Tegan as a travelling companion after becoming the last of her kind. Following Adric's death, a period of time alone with the Doctor and travelling alongside Marc, Kamelion and Turlough, Nyssa left the TARDIS to assist in the curing of those with Lazar's disease.

Nyssa assisted those harmed by the Time War and rejoined the Doctor, Tegan and Turlough before remaining in E-Space. She was eventually able to return and entered into a relationship with Tegan on Earth.

Early life
Nyssa was born on Traken (AUDIO: Primeval) as the daughter of Tremas, a consul, and his wife. (TV: The Keeper of Traken) Both of her grandfathers had died by the time she was born (AUDIO: The Toy) and her mother died when she was young. (AUDIO: The Haunting of Thomas Brewster)

Having grown up in the harmony of the Traken Union, Nyssa was shielded from the horrors of the universe. (AUDIO: 1001 Nights) She was brought up to be altruistic and to always put others before herself, a rule that she abided by. (AUDIO: The Entropy Plague) As Trakenite nobility, Nyssa learnt the manners and behaviours expected of her whilst the servants' children were able to share rooms and play in the grounds. (AUDIO: The Toy) She recognised that she had everything in her life handed to her on a plate. (AUDIO: The Peterloo Massacre)

Nyssa was a genius and became a scientist, with bioelectronics (TV: Castrovalva) and cybernetics being her strong points. (TV: Four to Doomsday) However, she knew very little about telebiogenesis. (TV: Castrovalva) She enjoyed tending a grove (AUDIO: Masquerade) and was once stung by a Lime Grove Wasp. (AUDIO: The Mutant Phase) She was able to let loose during the Autumn Festival, when her people hung paper lanterns on all the trees in the garden and carried all the fruits in, followed by singing and a food fight which included the consuls. It was undignified, but Nyssa loved it. (AUDIO: Spare Parts)

Tremas entered into a romantic relationship with Kassia (TV: The Keeper of Traken) and would play her a piece of Trakenite music when she was feeling low. Nyssa remembered the piece fondly. (AUDIO: The Entropy Composition)

Encounter with the Fourth Doctor
Nyssa attended Tremas and Kassia's wedding, after which she met the Fourth Doctor and Adric. Unbeknownst to her, planned to exploit the tremendous power of the Keepership, which her father was to inherit, by manipulating Kassia. Nyssa helped the Doctor and Adric prevent the Master from gaining the power of the Source, but was unable to prevent him from killing Kassia.

Afterwards, Nyssa and Tremas bid farewell to the Doctor and Adric. Nyssa told her father that he had to put everything back together again following the Master's actions, but did not witness her father being killed and taken over by the decayed Time Lord. (TV: The Keeper of Traken) Traken sent a message to the TARDIS telling him of the Master's escape and Tremas's disappearance, as well as telling him that Nyssa was alright. (TV: Logopolis)

Joining the Doctor
After the Trakens' message had been received by the Doctor, Nyssa met the Watcher who took her to Logopolis to find, as she wished to know what he had done to her father. She was reunited with the Doctor and Adric and met Tegan Jovanka before the Master enslaved her mind and used her in his complex plan to conquer N-Space. The Doctor was able to break the Master's control over her and she learnt that he had killed and taken over her father.

Whilst the Doctor, Tegan and the Master went to Earth in the latter's TARDIS, Nyssa and Adric remained in the Doctor's TARDIS on Logopolis. The Watcher helped Adric pilot the TARDIS and take them to Earth. However, during the journey, Nyssa witnessed the apparent destruction of the entire Traken Union thanks to an entropy wave, leading her to believe that she was the last of her kind. She witnessed the Doctor's regeneration into his fifth incarnation, (TV: Logopolis) after which she helped get him back to the TARDIS. (TV: Castrovalva)

With Adric and Tegan
Nyssa helped the Doctor get to the Zero Room, which she accidentally jettisoned in order to save the TARDIS from being destroyed in Event One. Arriving at Castrovalva for the Doctor's benefit, Nyssa found it was a secondary trap by the Master to get rid of the Doctor by using Adric to make block transfer computations. However, they managed to escape Castrovalva with Adric and the Doctor stabilised. (TV: Castrovalva)

Upon leaving Castrovalva, the TARDIS materialised in the Psychodrome, which created four competing kingdoms based on each of the travellers' individual perceptions of one another and their own backgrounds. Nyssa's perception proved to be the most dangerous due to her trauma causing her to associate the Doctor with the Master, resulting in the creation of King Magus. They were able to leave after acknowledging their flaws and shortcomings and affirm that they accepted one another despite them. (AUDIO: Psychodrome)

Nyssa met Chris Cwej and learnt from him of survivors of the Traken Union living on Serenity. With him, she went to a space station and discovered fusion devices. (PROSE: Cold Fusion) On an Urbankan ship, Nyssa was taken by the android inhabitants to become one of their own, but she was rescued by the Doctor and Bigon. Later, she fainted from stress (TV: Four to Doomsday) and slept in the TARDIS for four days thanks to the Doctor's delta wave augmenter. (TV: Kinda)

In 1666, Nyssa built a sonic booster with some help from Adric, which she used to destroy a Terileptil android. (TV: The Visitation) The crew went on to have adventures on Gallius Ultima, (AUDIO: The Star Men) in 1864 London (AUDIO: The Contingency Club) and on Zaltys where Gevaudan detected her psychic abilities. (AUDIO: Zaltys) In 1952, Nyssa met her doppelgänger Ann Talbot. Confusion between the two resulted in George Cranleigh kidnapping Nyssa by mistake, but he released her upon learning of the mix-up. (TV: Black Orchid)

On one occasion, the Doctor, Nyssa, Adric and Tegan spent Christmas with the renegade Time Lady Iris Wildthyme aboard the TARDIS. (AUDIO: Excelis Dawns) Nyssa encountered the Dar Traders who told her that she should be dead, later revising that to say that she had a strange connection with death due to being a Traken. On the Traders' ship, they showed her a mysterious box that contained an assassin, who stabbed her when they went to a planet to find the Doctor. (AUDIO: The Darkening Eye)

Due to a communication node disguised as a toy, Nyssa had recurring nightmares of her father on Traken. The telepathic call led her to a room where she saw a vision of the First Doctor and the Master on Gallifrey, the Doctor later telling her that the node had been locked away so that it could not be used to track himself and Susan. (AUDIO: The Toy) Working with Adric, Nyssa attempted to fly the TARDIS, which resulted in the ship materialising on Fleming's Island, the TARDIS falling off a cliff after the four left. Nyssa found herself briefly overwhelmed by the psychic presence of the I Predator, which they later managed to trap. (AUDIO: Iterations of I)

Nyssa encountered the Cybermen aboard Briggs's freighter in 2526, later witnessing the freighter's destruction with Adric aboard. (TV: Earthshock) She asked the Doctor if the TARDIS could go back and save him, but the Doctor refused. Whilst working through their grief, the TARDIS crew was embroiled in an adventure which sent a Concorde back through time. After they returned the airliner to 1980s Heathrow Airport, the Doctor and Nyssa left without Tegan. (TV: Time-Flight)

Alone with the Doctor
After leaving Tegan at Heathrow, (TV: Time-Flight) Nyssa and the Doctor travelled together on their own, although Nyssa remained in the TARDIS for one adventure whilst she mourned Adric. (PROSE: Long Term) She began to think about asking the Doctor to take her to Traken prior to its destruction. (PROSE: Empire of Death)

Nyssa and the Doctor visited 1945 Maine, (PROSE: Tip of the Tongue) Monitoring Base XL-7, (PROSE: Lonely Days) 1980s Wales, (PROSE: Past Reckoning) Lethe (PROSE: The Parliament of Rats) and Carnon Manor, where Nyssa cried for the first time since Traken. (PROSE: The Eternity Contract) At some point, they met P. G. Wodehouse. (AUDIO: Autumn)

An attempt by Nyssa to repair the TARDIS's chameleon circuit resulted in the craft turning into a whale, which the pair then had to recover. (AUDIO: The Deep) They visited Alaska, where they stopped the Permians from Earth's prehistory spreading over the planet and wiping out humanity, (AUDIO: The Land of the Dead) and defeated the Spillagers in Switzerland, where Nyssa found that her nascent telepathic powers were developing. (AUDIO: Winter for the Adept) Unbeknownst to her, this was due to Kwundaar's manipulations. (AUDIO: Primeval)

Whilst Nyssa was repairing the TARDIS, it was thrown into a time corridor to the 22nd century where she met the Daleks for the first time. (AUDIO: The Mutant Phase) Later, the Doctor took Nyssa to ancient Traken due to an illness which they discovered to have been caused by Kwundaar, who planned to use Nyssa to gain control of the Source. (AUDIO: Primeval) She also helped the Doctor defeat Cardinal Zero. (AUDIO: Spring)

The TARDIS landed on Mondas where Nyssa witnessed the birth of the Cybermen. She attempted to persuade the Doctor to prevent the rise of the Cyber-race in order to save Adric and left believing that they had at least done some good. (AUDIO: Spare Parts) She was interrogated on Veln, unaware that the TARDIS had caused the disaster that resulted in the Velns' predicament, (AUDIO: Creatures of Beauty) and was locked in the Tower of London after the Doctor gave her incorrect currency to pay their tavern bill. (AUDIO: Summer)

On a devastated planet, Nyssa was deceived by the Doctor into believing that he would remain and she would have to be the Doctor. (PROSE: Confabula) She helped defeat the Xyz (PROSE: Not So Much a Programme, More a Way of Life) and Morian (AUDIO: The Game) but failed to beat a duplicate of Ian Bird, prompting the Doctor to suggest a holiday. (PROSE: The 57th)

Nyssa was reminded of how much she missed her family whilst on Saturn, which reminded her of her home planet. (PROSE: Saturn) She saw a vision of her father in 12th century Lebanon as the result of an unexplained phenomenon (PROSE: The Church of Saint Sebastian) and contemplated living on Earth after falling in love with Andrew Harper, the first man that she ever kissed, in 21st century Stockbridge. Although she ended their brief relationship, she left for him the manuscript of a novel she had tried her hand at writing. (AUDIO: Autumn)

For a short while, Nyssa undertook a solo expedition to 13th century Rhodes whilst the Doctor visited Stockbridge in the 20th century. During that time, she communicated with the Doctor across time and space through a pocket interocitor. Due to the Daleks' manipulation of time and space, she and a knight called Mulberry were transported to the middle of the American Civil War. Following her rescue by the Doctor, (AUDIO: Renaissance of the Daleks) the pair visited Vortis where they helped the Menoptera against the Zarbi. (AUDIO: Return to the Web Planet)

With Brewster
Due to a temporal accident, Nyssa and the Doctor were separated, with Nyssa being stranded in 1867 London. She was kidnapped from 107 Baker Street by Thomas Brewster, who later stole her TARDIS key and flew away in the TARDIS, (AUDIO: The Haunting of Thomas Brewster) leaving Nyssa and the Doctor stranded on Earth for five months.

The Doctor used Block Transfer Computation in attempt to bring back the TARDIS but instead ended up changing time and saving Adric, who died once more after helping Brewster pilot the TARDIS back to 1868. The Doctor invited Brewster to join himself and Nyssa in the TARDIS, an offer that he accepted. (AUDIO: The Boy That Time Forgot)

The TARDIS began to malfunction due to Brewster having sold some of its parts, including the conceptual geometer which led to the TARDIS's internal dimensions to start collapsing. However, the team were able to recover it. (AUDIO: Time Reef) They later visited 2008 per Brewster's request, where he elected to stay with Connie Winter rather than continue travelling with Nyssa and the Doctor. (AUDIO: A Perfect World)

Continued adventures alone
Nyssa and the Doctor visited London during Christmas 1539, where they had to ensure Henry VIII's marriage to Anne of Cleves, (PROSE: God Send Me Well to Keep) saved Earth by obtaining an album capable of enslaving the human race from Alan Collins (PROSE: Tweaker) and visited the SS Hermes. (PROSE: Curiosity)

Not wanting to visit Stockbridge in the 21st century due to her relationship with Andrew Harper, Nyssa had the Doctor take her to Stockbridge in 1899 instead to celebrate Christmas. From there, they travelled to 1199 where they defeated the Rutan Host. (AUDIO: Castle of Fear) They returned to Stockbridge where they defeated the Lord and Lady of the Manor, possible future versions of the two travellers. (AUDIO: The Eternal Summer) Visiting the village again in the 45th century, they fought the Daleks once more. (AUDIO: Plague of the Daleks)

On 1665 Earth, Nyssa tricked the Speera into becoming the "human mean" before also taking on characteristics of herself and the Doctor, resulting in fatal anomalies which killed them. (AUDIO: The Demons of Red Lodge) They encountered the Entropy Sirens on Concordum, (AUDIO: The Entropy Composition) visited Folly (AUDIO: Doing Time) and worked on Doctor Demonic's Tales of Terror, with Nyssa posing as a European actress. (AUDIO: Special Features)

The Entity had Nyssa and the Doctor attempt to pass its test, but they failed. (AUDIO: Seven to One) They also visited the Miaxa's prison, (AUDIO: My Brother's Keeper) 1892 Norwood, where Nyssa was infected by Interplanetarian, (AUDIO: The Interplanetarian) Fabula (AUDIO: Smuggling Tales) and a country where she was forced to tell stories of her adventures to a sultan. (AUDIO: 1001 Nights)

In an alternate 1963, Nyssa helped the Doctor defeat Lenny Kruger, who had been using the Common Men to gain power. (AUDIO: 1963: Fanfare for the Common Men) On 23 November of that year, Nyssa and the Doctor visited Bob Dovie, whose parents' corpses Nyssa found shrunk by. (AUDIO: The Light at the End)

Nyssa and the Doctor landed on Traxana's moon, where Nyssa was kidnapped by the Cell-Spiders. She met Theebe and learnt that the spiders had been made by the Daleks for their war against the Movellans. Nyssa and the Doctor were both captured by the Daleks (AUDIO: Alien Heart) and taken to Mojox, but they quickly managed to escape. (AUDIO: Dalek Soul) They later visited Snittlegarth in 1357. (AUDIO: The Second Oldest Question)

With Hannah
Visiting the hunting grounds of Nathaniel Whitlock in 1911 Suffolk, Nyssa and the Doctor met Hannah Bartholomew and became aware of the presence of Vartas on the planet. Nyssa stood guard whilst the Doctor and Silver Crow entered the Ghost Dance to trap Vaatus once again and later departed with him in the TARDIS, (AUDIO: Moonflesh) unaware that Hannah had stowed away on board.

The TARDIS landed on an Arrit tomb ship where Nyssa, the Doctor and Hannah defeated the Arrit-Ko. Although the Doctor set the coordinates to return Hannah home following the adventure, he said that that would most likely be the last place that the TARDIS would land. Thus, Hannah was accepted as a companion. (AUDIO: Tomb Ship)

On SORDIDE Delta, Nyssa was trapped in a virtual reality where the Doctor was her guardian and Hannah was her 18th century tutor. Hannah was able to save both Nyssa and the Doctor but lost all of her emotions in the process, prompting her to leave the TARDIS and remain on the space station to help the survivors. (AUDIO: Masquerade)

Tegan's return
When Nyssa and the Doctor were taken to Gallifrey, Nyssa forcefully stood up to the High Council in an attempt to save him from being executed to prevent Omega's escape from the anti-matter universe. She and the Doctor escaped Gallifrey and travelled to 1983 Amsterdam where they bumped into Tegan, who helped them to stop Omega from returning. Tegan joined the TARDIS crew once more (TV: Arc of Infinity) and went with them to the Rijksmuseum where they discovered that Rembrandt had drawn functional spacecraft. This led to the team learning of and defeating the Nix. (AUDIO: The Waters of Amsterdam) After Nyssa and Tegan spent some time together holidaying in Amsterdam, the Doctor returned for them.

The Doctor took Nyssa and Tegan to Florana where they found that the High Priest was a Dalek. Nyssa was temporarily brainwashed by the Elite academy to follow their philosophy, but the Doctor reversed the conditioning and they defeated the Dalek. (AUDIO: The Elite) The day after leaving Amsterdam, the team visited Akoshemon's moon where they fought the Dark, who influenced Nyssa for a time. (PROSE: Fear of the Dark) To recover after Florana, the trio spent a few days in Brisbane, later encountering the Hexagora. (AUDIO: Hexagora)

Nyssa, the Doctor and Tegan visited Sirius after the TARDIS's temporal scanner picked up a message during one of Nyssa's experiments. (AUDIO: The Children of Seth) She remained in the TARDIS whilst the Doctor and Tegan explored Aronassus 49 (PROSE: Danger Down Below) but helped them defeat Vi'Al, (PROSE: The God Machine) Voorvolika, (PROSE: The Armageddon Chrysalis) Carnak, (PROSE: The Haven) the Dren (PROSE: The Penalty) and, in 1982,. (PROSE: Night Flight to Nowhere)

The trio visited the Necropolitan to view a memorial to Adric and ended up solving a murder. (PROSE: Wake) They saved the universe from potential destruction by a cyclotron (PROSE: Lackaday Express) and, after Nyssa was kidnapped, the Doctor had Ann Cranleigh pretend to be her to foil a plot. (PROSE: The Sands of Time) She found herself transformed into a feral monster for a time thanks to anti-matter on Morestra. (PROSE: Zeta Major) On an Earth colony, neither Nyssa nor the Doctor were as affected by Anna as Tegan was due to their not being human. (PROSE: Soul Mate)

On F-four, Nyssa and the Doctor carried out biological tests, causing Tegan to feel left out. Nyssa's work was invaluable to the colonists. (PROSE: No Exit) They met Flavius Theodoric in 493 Ravenna (PROSE: Goths and Robbers) and both Nyssa and Tegan were chased by Endovorms disguised as stone lions in Trafalgar Square in 1843. (AUDIO: The Lions of Trafalgar) Nyssa found herself a part of The King of the Dead in 1982 (AUDIO: The King of the Dead) and helped solve a murder in Mistpuddle. (AUDIO: The Mistpuddle Murders)

The TARDIS team encountered dinosaurs and a number of other creatures in the Sahara Desert, (PROSE: Great Snakes!) the TARDIS, (PROSE: Crocs!, 'Gators, Caimans and Gavials, The Great Irish Elk, Horses Through the Ages) Siberia, (PROSE: Woolly Mammoth) Kenya, (PROSE: Elephant Hunt, Face to Face with Early Man, On Safari, Elephant Dance) Los Angeles during the Ice Age, (PROSE: Sabre-toothed Tiger, The Great Irish Elk) Loch Ness (PROSE: The Loch Ness Monster) and Dorset, where they witnessed Mary Anning's discovery of the Ichthyosaurus. (PROSE: Amazing Fossil Fish)

Marc joins
The Doctor took Nyssa and Tegan to 63 BC Cumae so that he might meet Cicero. The three travellers were put through a series of tests by Tartarus, along with Cicero and his slave Marc, to identify a leader for the Zorth. Whilst in Tartarus's world, Nyssa invited Marc to join them in the TARDIS, an offer that he accepted. (AUDIO: Tartarus)

On Proxima in the 30th century, Nyssa helped defeat Professor Kalu. (AUDIO: Interstitial) In 19th century Ireland, Nyssa was influenced by the Spae Wife and led a carnival, hoping to get access to the TARDIS. Tegan reminded Nyssa of who she was in order to remove the Spae Wife's influence. (AUDIO: Feast of Fear)

Landing on Samotis, the TARDIS crew were drafted into the race. (AUDIO: Warzone) Nyssa cared for Marc in the TARDIS after he was partially cyber-converted and was, with the Doctor, able to hack the mainframe and reverse all mental programming, restoring each Cyberman's memories and restoring Marc. Afterwards, the Doctor left his companions on Carlanna with a great deal of money, feeling guilty over Marc's conversion. (AUDIO: Conversion)

After Marc
Travelling with just the Doctor and Tegan once more, Nyssa visited Prague where they helped Szlth'TOK and Abloran reach a settlement. (PROSE: Men of the Earth) Influenced by the Mara, Tegan then caused the TARDIS to materialise on Manussa, where Nyssa and the Doctor released her from the Mara's power. (TV: Snakedance)

Shortly after, the trio visited 1993 Tasmania where Nyssa was bitten by a vampire. (PROSE: Goth Opera) They later went up against a vampire cult on Gallifrey. (COMIC: Blood Invocation)

Aboard the HMS Aquitaine, Nyssa was separated from her travelling companions and was the first to discover that there were people aboard other than the robot Hargreaves. (AUDIO: Aquitaine) They visited Manchester again, in 1819, at the time of the Peterloo Massacre. Nyssa attended the protest with Cathy Roberts and witnessed her son Peter's death, which enraged her. (AUDIO: The Peterloo Massacre)

With Tegan and Turlough
Nyssa mistook Mawdryn for the Doctor, believing that he had gone through a gruesome regeneration and was infected by his disease. The Doctor nearly gave up his remaining lives to save her and Tegan, but Alistair Gordon Lethbridge-Stewart's Blinovitch Limitation Effect allowed for another cure to be found. Vislor Turlough joined Nyssa, the Doctor and Tegan, who were all unaware that he was an agent of the Black Guardian. (TV: Mawdryn Undead)

Just after Turlough joined them, the TARDIS team arrived in the Gardens of the Dead where the companions had to work together to save the Doctor. Nyssa told Turlough about how her father had been taken over by an evil being. (AUDIO: Gardens of the Dead)

Nyssa and the others met Ophiuchus in the Cloisters of the Capitol and, with Tegan, convinced the Doctor to save him rather than let him die, saying that he was not a monster like the Master. After Ophiuchus regenerated into a woman, the Doctor explained Time Lord gender to Nyssa. (COMIC: Ophiuchus)

Departure
After the TARDIS attached itself to Terminus, Nyssa found herself lost on the leper ship and infected with Lazar's disease. She left a trail of her own clothes so that the Doctor might be able to find her and was eventually taken prisoner and cured by the Garm. Knowing that she could synthesise the Hydromel, Nyssa chose to stay aboard Terminus in order to help the Garm and cure those with Lazar's disease.

Nyssa said farewell to her travelling companions and gave the Doctor a kiss on the cheek. She hugged Tegan and told her that she would be okay as, like Tegan, she was indestructible. (TV: Terminus)

Life after leaving
Some time after leaving the Doctor, Nyssa was transported to the Death Zone where she met Ian Chesterton, Steven Taylor, Sara Kingdom and Polly Jackson and was reunited with the Fifth Doctor, who had already travelled with her older self in his personal timeline. (AUDIO: The Five Companions)

Nyssa eventually left Terminus and settled down as an academic in a university. During that period of her life, she encountered the Fourth Doctor again, long before he had first met her on Traken. (PROSE: Asylum) She married Lasarti, a man who studied dreams, and had two children: Neeka (AUDIO: Winter) and Adric. (AUDIO: Prisoners of Fate) She was reunited with the Fifth Doctor once more when she assisted with his regeneration into his next incarnation. (AUDIO: Winter)

During the Time War, Nyssa operated a hospital ship known as the Traken and assisted planets that became caught up in the war. She met a man who called himself Dr Foster and became her assistant, although she came to suspect him of being a Time Lord saboteur. In truth, the saboteur was Dr Isherwood. Dr Foster departed after giving Nyssa a kiss on the cheek, reminding her of how she had said goodbye to the Doctor on Terminus. (AUDIO: A Heart on Both Sides)

Reunion with the Doctor, Tegan and Turlough
Half a century after leaving the Doctor, Nyssa was reunited with him, Tegan and Turlough on the planet Helheim in 3530 while trying to find the cure for Richter's Syndrome, which had claimed over six billion lives. With her own ship destroyed, she asked for a lift home, but resigned herself to more adventures when the Doctor opted to take her by "the scenic route." (AUDIO: Cobwebs) They travelled to Chodor in the 28th century where they encountered the Takers (AUDIO: The Whispering Forest) and Manussa during the rule of the Manussan Empire where they once again fought against the Mara. (AUDIO: The Cradle of the Snake)

During these later journeys in the TARDIS, she told Tegan that she was married and had two children, a daughter much like Tegan and a teenage son named Adric. (AUDIO: Heroes of Sontar) She also admitted that in her personal timeline she had already experienced the Doctor's problematic regeneration into his sixth incarnation. (AUDIO: Winter) Thus, during this second period of travel with the Doctor, she had to keep her knowledge of the Fifth Doctor's end hidden from him. (AUDIO: Heroes of Sontar, etc.) She was tempted to help intelligent rats create a non-lethal plague in exchange for some tips in fixing the destabilising Helheim cure. (AUDIO: Rat Trap)

During an adventure in India on 31 December 1926, Nyssa was rejuvenated, appearing once again as she had during her early travels with the Doctor. (AUDIO: The Emerald Tiger)

After the TARDIS was pulled off course and landed on Valderon, Nyssa learned that 25 years had passed since her mission to Helheim and that she was presumed dead. She reunited with her son, Adric, who was researching a way to cure Richter's Disease and learned that her husband had died and her daughter was in suspended animation on another planet, having herself been infected while treating the ill. Adric and Nyssa were able to combine their knowledge to develop a cure. They were to meet in one month's time and revive and cure Neeka, but Adric never saw her again. (AUDIO: Prisoners of Fate)

E-Space and departure
Shortly after leaving Valderon, the TARDIS was diverted into E-Space when it passed too close to a CVE. While searching for a way out, the TARDIS visited Adric's home planet of Alzarius (AUDIO: Mistfall) and the ice world of Isenfel, where she became interested in why the society there wanted to be in equilibrium. (AUDIO: Equilibrium) Nyssa's travels with the Doctor finally ended when the TARDIS crashed on the planet Apollyon, where Nyssa chose to stay behind to power a portal back to N-Space as she was dying from Entropy. (AUDIO: The Entropy Plague)

Later life
Although reverted to her original physical age, Nyssa then lived for at least another decade, spending a few years treating the sick and teaching others to do the same before she retired to tend a garden. She was last recorded witnessing a new star emerging in the sky, hinting that there was new life in E-Space despite the Doctor's concerns that the entropy meant that E-Space only had a few centuries of life left in it. (AUDIO: The Entropy Plague)

According to one account, Nyssa entered a romantic relationship with Tegan on Earth. Together, they attended Sarah Jane Smith's memorial on a "bright, cold spring day", where they discussed Sarah Jane with other guests, and helped fight the Jackals of the Backwards Clock to foil the Trickster's plot for revenge. Clyde Langer described the two as an Australian couple. (WC: Farewell, Sarah Jane)

Undated events
At some point, an image of Nyssa was obtained by UNIT and kept in the Black Archive as a record of her having been a companion of the Doctor. (TV: The Day of the Doctor)

Alternate timelines
At some point, while she was travelling alone with the Fifth Doctor, they visited Bob Dovie at 59A Barnsfield Crescent in Totton, Hampshire on 23 November 1963. There, she and the Fifth Doctor discovered Bob's odd behaviour, including him talking on a phone that was disconnected from the wall. After finding Bob's family killed by the Master using a Tissue Compression Eliminator, Nyssa and the Doctor took Bob into the TARDIS causing the Master's conceptual bomb to explode. This timeline was eventually erased when the Doctors' other selves were able to render the conceptual bomb useless. (AUDIO: The Light at the End)

Personality
Nyssa seemed at once more mature and more naive than her fellow travellers. She did not boast of her scientific knowledge nor believe it made her superior. She faced her challenges with the determination and serenity of her Trakenite heritage. She turned her sorrow as the last of her people into a desire to help others. Rarely did she mention any grief she suffered because of her great misfortunes. Perhaps most extraordinarily, she never sought to avenge herself on the Master despite her many good reasons to do so.

Tegan noted that Nyssa preferred to "care and share." (PROSE: Goth Opera) Her trusting nature sometimes made her less alert to deception than Tegan (TV: Mawdryn Undead) but it also made her more adept at negotiating an effective balance between strong personalities. (TV: Earthshock, AUDIO: The Game) She had probably the closest relationship with the Fifth Doctor of any of his companions, though she did occasionally argue with him and was incredibly upset when he broke her trust on Valderon, in spite of his good intentions. (AUDIO: Prisoners of Fate) Nyssa's near-royal upbringing and natural curiosity sometimes made it hard for her to relax and enjoy herself. Though her outlook usually tended to be serious, she displayed a dry wit on occasion, particularly when dealing with the Doctor's boyish idiosyncrasies.

Like all Trakenites, she tended towards pacifism, though on separate occasions she destroyed a Terileptil android in September 1666 (TV: The Visitation), killed a Cyberman in the TARDIS (TV: Earthshock) and used the threat of violence to save the Doctor's life, shooting a pair of guards on Gallifrey. (TV: Arc of Infinity)

She considered Tegan to be her best friend (AUDIO: The Emerald Tiger) and Tegan held her in the same esteem. (AUDIO: The Waters of Amsterdam) However, she also "never quite understood" why so many of the Doctor's friends were human. (AUDIO: The Boy That Time Forgot)

Nyssa generally didn't use a surname, referring to herself only by the mononym "Nyssa" or, in formal circumstances, "Nyssa of Traken" or "Nyssa, daughter of Tremas." When posing as a human actor, however, she assumed the name "Nyssa Traken." (AUDIO: Special Features)

Tegan considered Nyssa to be "too good for this world," once expressing a desire to be more like her. (AUDIO: Aquitaine)

Although she initially wanted to murder the Master for killing her father, Nyssa eventually forgave him. (AUDIO: The King of the Dead)

The Doctor considered Nyssa to be "terribly nice". (AUDIO: Alien Heart)

Behind the scenes

 * Nyssa was originally meant to have appeared only in The Keeper of Traken as a supporting character. She was, therefore, the sole creation of writer Johnny Byrne, to whom royalties had to be paid when the character was used. Like the Brigadier and K9, she is a rare example of a series regular to whom the BBC does not enjoy sole copyright.
 * Peter Davison was known to have preferred Nyssa over any of his other companions. He intervened on several occasions when John Nathan-Turner attempted to write the character out of the series.
 * Perhaps in deference to Davison's affection for Nyssa and in part because of Janet Fielding's long reluctance to appear in audio dramas, Big Finish Productions greatly expanded Nyssa's role. They built a network of stories in the televised gap between Tegan's departure in Time-Flight and her return in Arc of Infinity which was very much greater than it had appeared on television. Starting with The Land of the Dead, the Fifth Doctor began a long series of audio adventures with Nyssa as his sole companion. Consequently, Nyssa is one of the most frequently appearing companions in the history of performed Doctor Who stories.
 * Like the Fifth Doctor, Adric and Tegan, Nyssa was given a "costume" rather than a basic "look" by producer John Nathan-Turner. Nyssa's original costume narratively originated on Traken. It suggested her highborn status. It consisted of a maroon velvet jacket, a diaphanous, iridescent skirt and multi-pastel, high-heeled shoes. It was accessorised with an ornamental hair comb and a woolly purse. This look persisted through the end of part two of Castrovalva. However, long before this episode was filmed, it was determined the actor needed more practical clothing for the physical demands of her now-co-starring role. She exchanged her skirt for a pair of maroon trousers, lost the purse and began wearing lower-heeled shoes. According to production notes on the DVD release of the preceding story, Logopolis, the second iteration of Nyssa's "royal Traken" look was inspired by a rehearsal in which actress Sarah Sutton wore Nyssa's top, but her own corduroy trousers. She also lost her hair comb. She completely abandoned the "royal Traken" look in Snakedance and changed her look every story thereafter until her departure in Terminus. Famously, her costume for her final story was mostly just the slip she had been wearing under her Mawdryn Undead dress.
 * Images of the older version of Nyssa on cover images for the audio arc in which she rejoined the TARDIS crew were based on contemporary photos of Sarah Sutton.
 * Discounting the ambiguous status of various UNIT personnel, Nyssa is the first companion to be introduced in one story and established as a companion in another.
 * She is the first companion to kiss the Doctor on-screen.

Nyssa