- You may be looking for the general concept of a time war.
The Time War — or the Last Great Time War — was the war between mighty races, the Time Lords and the Daleks, "for the sake of all creation". It resulted in the destruction of Gallifrey, leaving only two (known) Time Lords and a small number of Daleks as survivors.
The war
The beginning
The Time Lords predicted that in one possible timeline, the Daleks would "destroy all other life forms and make themselves the dominant creature in the universe." The Time Lord Ferain sent the Fourth Doctor on a mission to Skaro during the Thousand Year War with certain objectives:
- If possible, to avert the creation of the Daleks
- Otherwise to alter their development and make them less aggressive
- To find some intrinsic flaw or weakness to exploit in the Daleks
The Doctor believed he might have set back the history of the Daleks for a thousand years. (TV: Genesis of the Daleks) This step led the Daleks to go to war with the Time Lords. (WC: Captain Jack's Monster Files: Dalek, COMIC: Hunters of the Burning Stone, AUDIO: The Dalek Conquests)
In revenge of the Time Lords plot to destroy them, the Daleks attempted to create a duplicate of the Doctor to send to Gallifrey and assassinate the High Council of the Time Lords. (TV: Resurrection of the Daleks, AUDIO: The Dalek Conquests)
The final Dalek attempt to attack the Time Lords involved the Hand of Omega, which Davros attempted to use to make the Daleks have mastery over time like the Time Lords. The Seventh Doctor tricked Davros into using the Hand of Omega to destroy Skaro's sun. (TV: Remembrance of the Daleks, AUDIO: The Dalek Conquests)
After this, the Daleks next step was to start a war with the Time Lords. (AUDIO: The Dalek Conquests)
The conflict
The main force was made of a fleet of Dalek flying saucers, which had a total of ten million, and they unleashed the full might of the Deathsmiths of Goth. The Time Lords used over a million Battle TARDISes. (PROSE: Peacemaker)
The start of the War. (COMIC: Agent Provocateur)
The Eighth Doctor joined the Time Lords in the fight against the Daleks after witnessing the death of a child at the hands of a Dalek. (PROSE: Museum Peace) The Sontarans told legends of the Doctor leading Time Lords into battle. (TV: The Sontaran Stratagem)
In the first year, Davros was killed at the Gates of Elysium when his command ship flew into the jaws of the Nightmare Child. The Doctor tried to save him, but failed. Eventually, Caan, the last survivor of the Cult Of Skaro, time shifted back into the war and saved Davros from the time-locked event at the cost of his own sanity, bringing him into the post-war universe. (TV: The Stolen Earth, Journey's End)
During the war, the entire chain of Hotel Historia was destroyed, (COMIC: Hotel Historia) Polymos was destroyed, (PROSE: The Dust of Ages) and Kolox was destroyed, leaving behind the Kolox Nebula. (COMIC: The Skrawn Inheritance) Another of the battlefields was Arcadia, where the Doctor fought. (TV: Doomsday) At the heart of the war, millions were killed and brought back to life every second. (TV: The End of Time)
The Time Lords resurrected the Master, believing him an excellent soldier. The Master was at the Cruciform, but when the Dalek Emperor took control of it, he ran in fear. (TV: The Sound of Drums) Later in the war, Rassilon was President and led the battle to save Gallifrey. (TV: The End of Time)
Gallifrey during the final days of the War (TV: The End of Time)
Towards the end of the war, the Daleks sent a capsule to Earth in the year 70 to spread the Dalek Factor amongst humans. The capsule's engine exploded and the Dalek was killed soon after impact. It released only a small amount of the Dalek Factor, leading to only one in five hundred million humans having it. (PROSE: I am a Dalek)
During the War, the Eighth Doctor tried to regain the Great Key, which had been stolen by unknown forces. After being imprisoned for a month, with the help of Chantir, he overpowered the guards and escaped with the key. With the key, he believed that the De-mat Gun could be replicated and the Medusa Cascade closed. The Doctor planned to modify the gun so that instead of it removing an individual from time and space, it would remove millions. (COMIC: The Forgotten) This modified De-Mat Gun became the Moment, the weapon that would destroy Gallifrey. (TV: The End of Time, COMIC: Don't Step on the Grass)
Conclusion
By the end of the war, President Rassilon was so desperate he proposed the Ultimate Sanction. The Time Lords would become creatures of pure consciousness and all of creation would be destroyed. Other horrors and terrors seen in the final days of the war (including the Daleks) were the Nightmare Child, the Skaro Degradations, the Horde of Travesties and the Could've Been King with his Army of Meanwhiles and Neverweres. The Tenth Doctor described the war's final days as "hell." (TV: The End of Time)
Gallifrey's destruction. (COMIC: Agent Provocateur)
Near the end of the War, the Doctor rejected his name, and the Time Lords called him simply, "The Renegade". Priyan believed that the Doctor now stood against the Time Lords, and would use the Moment to his own ends. By the last day of the war, the Daleks had destroyed every Battle TARDIS, and began to invade Gallifrey itself. (COMIC: Sky Jacks)
Learning the Doctor possessed the Moment, on the last day of the war, the Time Lord High Council tried to escape the time lock by implanting a signal in the mind of the Master when he was a boy and sending a diamond called a White-Point Star to Earth in 2009, where the Saxon Master had escaped to. With the signal inside the older Master and six billion humans converted by the Immortality Gate into the Master Race to triangulate it, the Master made a connection with the Time Lords' signal.
Five Time Lords, including Rassilon and the Woman, escaped to Earth in 2009, where Gallifrey itself started to return and everything from the war could escape. The Tenth Doctor, who had already ended the war some time before, broke the connection by shooting the White-Point Star; the Time Lords, Gallifrey, and the Master vanished in a burst of white light and were sent, according to the Tenth Doctor, "back into [the] hell" of the Time War.
Knowing of Rassilon's plot to destroy time, a younger incarnation of the Doctor used the Moment to end the war. (TV: The End of Time)
Gallifrey was destroyed in a silent flash as bright as a sun. Its annihilation was so profound it stretched deep into the past and far into the future. (PROSE: The Eyeless) The Cruciform fell when Gallifrey was destroyed. (COMIC: The Forgotten) The blast was so powerful the universe convulsed as planets, systems and galaxies were obliterated. (COMIC: Agent Provocateur)
When the Doctor used the Moment, the war was time locked, (COMIC: Don't Step on the Grass) making it (in theory, or at least according to the Tenth Doctor) impossible to revisit the events; Dalek Caan, however, somehow entered, albeit at the cost of his sanity. (TV: The Stolen Earth)
The Eye of Time, long possessed by the Time Lords, vanished from the universe at the fall of Gallifrey. (GAME: City of the Daleks)
The Ninth Doctor explained to Rose that even saving one man who "wasn't supposed to be alive" affected the whole of time. The Doctor rhetorically asked Rose whether she believed that the thought hadn't occurred to him to go back and save his people and planet. While the Ninth Doctor did not reference the Time Lock, he certainly knew attempting to save his people would have grave consequences. (TV: Father's Day)
According to the Tenth Doctor, the time lock prevented him going back and saving his people. (TV: The Fires of Pompeii)
With the exception of a very few survivors, the Time Lords and the Daleks disappeared from time and space. (TV: Dalek, The Parting of the Ways, Army of Ghosts/Doomsday)
Aftermath
The war was mostly invisible to "lower species", but devastating to time-aware "higher" ones. The Time Lords were thought of as myths by higher species like the Forest of Cheem. (TV: The End of the World, The Stolen Earth)
- The Nestene Consciousness's food stock planet was destroyed. (TV: Rose)
- The Gelth lost their physical bodies because of the war. They were reduced to gaseous forms. (TV: The Unquiet Dead)
- Though the Sontarans were aware of the war, they weren't allowed to take part (TV: The Sontaran Stratagem), as opposed to the Graxnix who were one of the lowest races to take part. (COMIC: Hotel Historia)
- Eve's species was wiped out in the Last Great Time War. (TV: SJAF 2)
The destruction of the Time Lords created a vacuum that may have left history more vulnerable to change. The Ninth, Tenth and Eleventh Doctors explained to Rose Tyler, Donna Noble and Clara Oswald that time was in flux and history could change instantly — a big change from the way it had been. (TV: The Unquiet Dead, The Fires of Pompeii, The Unicorn and the Wasp, Cold War)
The Doctor would later hold a book detailing the events of the Time War in the TARDIS library (TV: Journey to the Centre of the TARDIS)
The most dramatic demonstration of this was when Rose created a temporal paradox by crossing her own time stream to save her father, Pete, just before his death in a traffic accident. This summoned the Reapers, who descended to sterilise the "wound" in time by devouring everything in sight. The Ninth Doctor said that if the Time Lords had been still around, they could have held back the Reapers and prevented or repaired the paradox. (TV: Father's Day)
As well, the Tenth Doctor noted that when the Time Lords were around, travel between parallel worlds was less difficult. With their demise, the paths between worlds were closed. (TV: Rise of the Cybermen)
Known survivors
The Dalek Emperor, one of the survivors of the war (TV: The Parting of the Ways)
Gallifrey inhabitants
- The Doctor; he stated in his ninth body that if any other Time Lords lived, he would have sensed their presence. (TV: Dalek)
- The Master survived by travelling to the year 100 trillion, and having used a Chameleon Arch to become the human Professor Yana to escape the war. His use of the arch prevented the Doctor from sensing his existence. (TV: Utopia)
- Whilst not a Time Lord, Leela was a resident of the Capitol on Gallifrey. She survived for at least a short time after the destruction of Gallifrey. (AUDIO: The Catalyst)
- K9 Mark I survived the destruction of Gallifrey before travelling through time to the year 2050. (TV: Regeneration)
Daleks
- A single Dalek survived and crashed on Ascension Island on Earth in 1962. (TV: Dalek)
- The Dalek Emperor also survived. He had fallen through time to approximately the 2,000th century. (TV: The Parting of the Ways)
- The Daleks sent a time capsule to 70 AD Earth in order to spread the Dalek Factor amongst the humans. (PROSE: I am a Dalek)
- The Cult of Skaro and the Daleks imprisoned in the Genesis Ark escaped the attentions of the Bad Wolf, having left the universe for the Void before the end of the war. (TV: Doomsday)
- A group of Daleks that appeared to be Time War era appeared in the 22nd century. (COMIC: The Living Ghosts, Extermination of the Daleks)
- Several Daleks who had survived several pre-Time War encounters with the Doctor on the planets Kembel, Spiridon, Exxilon, Aridius and Vulcan resided in the Dalek Asylum. (TV: Asylum of the Daleks)
Others
- Though Davros was believed by the Doctor to have been killed in the war (consumed by the Nightmare Child), Dalek Caan temporal shifted into the war and rescued him. (TV: The Stolen Earth, Journey's End)
- The Advocate escaped the Time War when Davros was rescued by Dalek Caan. (COMIC: Fugitive, Don't Step on the Grass)
- Eve was sent to Earth as a child to survive extermination in the Time War. (TV: SJAF 2)
- The Gelth survived but lost their physical bodies, reduced to a gaseous state. (TV: The Unquiet Dead)
Behind the scenes
- A 2005 faux-documentary produced by BBC Radio, The Dalek Conquests, attempts to put the Time War into context with the Doctor's recurring conflicts with the Daleks over the years.
- A long-running story arc featured in the BBC Eighth Doctor Adventures book series concurrent with the return of Doctor Who to television in 2005 featured another Time War, the Second War in Heaven between the Time Lords and the Enemy. Russell T Davies, the producer of the revived TV series, has, however, been on record as stating that the Second War in Heaven is a different conflict, which is one reason why the war referenced on TV is called "the Last Great Time War."
Doctor Who: Battles in Time
Non-narrative material in Doctor Who: Battles in Time magazine revealed further survivors of the Time War.
- According to DWBIT 51, an army of Daleks were weakened and fell through time to 70 million years before the 21st century and were destroyed by dinosaurs.
- According to DWBIT 11, a Dalek ship crashed in an island in the western part of the North Atlantic Ocean, causing a disturbance in human vehicles and the mysterious disappearances of aircraft and surface vessels. Their ultimate fate is unknown.
Also, DWBIT 19 stated a group of Daleks massacred the pirate fleet of Captain Jack Lawrence in late September 1697.
