Astrologer Martin Trueman causes a stir with his uncanny insights and predictions. Sarah doesn't believe in astrology, but she does believe that all is not as it seems with Trueman. Around her, people are falling under Trueman's sinister spell, and even Mr Smith doesn't understand what's going on.
A young woman, Cheryl, is paying a regular visit to her astrologer, Martin Trueman. When she confides that she is spending her mortgage money to see him, Trueman is horrified and refuses to accept it, confessing to Cheryl that he is a con artist. As he stands by his window, unable to face her, he is hit by a shooting star. Suddenly, he's found a renewed belief in astrology. As his hand begins to crackle with red energy, he reaches out and grabs Cheryl's arm as she screams...
Some time later, Rani and her mum have dragged Mr Chandra, Luke and Clyde to Martin Trueman's astrology seminar at East Acton New Theatre. Sarah Jane has come, too, thinking she might do a story on Mr Trueman. Before entering the auditorium, each of them fills out a card with his or her birthday and gives it to Cheryl, who is now working as Mr Trueman's assistant. Luke, who was not really "born", does not have a birthdate, a fact that troubles him.
Mr Trueman begins his show by naming a random date and asking those born on that date to stand. Clyde stands, despite his stated intention not to; he is unnerved, but Sarah Jane reassures him that it's a trick of persuasion. Mr Trueman selects another audience member. To the audience's astonishment, he divines her life story. Sarah Jane can just convince her friends — and herself — that Trueman is just using cold reading techniques. Then Trueman selects her. He reveals an impossible amount of knowledge about seemingly ordinary Sarah Jane's extraordinary travels and more importantly, about the Doctor.
Stunned and intrigued, Sarah Jane stays after the show to talk to Trueman alone. She demands to know the source of his uncanny knowledge. He insists that astrology alone is responsible for his success. When he concludes the interview by warning Sarah Jane against opposing him, she has no choice but to leave, as baffled and as unnerved as when she met him.
On the way home Clyde encounters Trueman, who his commanding power he used on him in the theatre and walked to his house and transfers some of the Ancient Lights' power into Clyde to become his slave. In his trance Clyde suddenly seems to gain a new sense of purpose and direction, and sets off to meet Sarah Jane and Luke back at 13 Bannerman Road... where he threatens to kill them, while Mr Smith stands idly by and insists that "nothing is happening". Clyde's hand glows with lethal energy as his eyes glow crimson red and he points it at Sarah Jane, declaring that if she insists on interfering she must be destroyed.
Sarah Jane tries to talk Clyde out of threatening them and insists that he could never bring himself to harm her but he doesn't listen and Luke puts his hand on Clyde's shoulder as he prepares to destroy her. Clyde then collapses.
Various people in Bannerman road, including Gita, are all walking away as if possessed. Haresh and one of his neighbours are utterly bemused as to what is happening.
Clyde has woken up free from Trueman's control. Rani initially believes that this means the threat is over but Mr Smith shows them news broadcasts from all over the world; revealing that hundreds of people are all leaving their homes and workplaces, including the President of the United States. Rani doesn't believe they have much of a chance at stopping Trueman, considering they don't even now how they managed to free Clyde. Sarah Jane theorises that by pushing Clyde and trying to reach his intrinsic goodness, she managed to override any hypnotic techniques Trueman may have used.
The friends continue their discussion of Trueman. Mr Smith gives them background on astrology: a belief system widespread throughout the galaxy, he says and, in his opinion, mere superstition. It is a physical impossibility for "imaginary patterns in the sky" to affect reality, as the computer puts it. Luke theorises that, if that is the case, maybe the Ancient Lights Trueman speaks of are from another universe... the one that existed before Event One.
Mr Smith interrupts the theorising to patch through a television programme. Mr Trueman has taken over the airwaves and broadcast one of his astrology talks. This lecture/demonstration features a large, twelve-pointed star, each arm marked with a different sun sign. Trueman lights up the points of the star one by one, giving him control over people born under that sign.
He begins with those he considers brothers and sisters born under the sign of Gemini, a group that includes Rani's mum. The investigators return to the theatre to stop the broadcast, but the possessed Children of Gemini prevent them from entering. Clyde bluffs his way through by making up horoscopes.
The Ancient Lights create a portal to the theatre. Trueman reveals that Luke's theory on the Ancient Lights is true: in the previous universe, he claims, they controlled all lifeforms. The Ancient Lights survived the Big Bang and needed Martin Trueman to rule the world because he was the "Chosen One". Sarah Jane tries to talk him out of it, but he will not listen.
Rani and Luke try to shut down the broadcast by flicking the mains switch off, but the Ancient Lights protect it with a force field. As they struggle to find a way through, Trueman's wheel reaches the sign of Aries, and Rani, an Aries, falls under Trueman's control. However, when Luke grabs the switch, he finds himself able to bypass the forcefield; unfortunately, this has no effect. Trueman mocks Sarah Jane for believing that the simple flick of a switch would stop a power that survived the Big Bang; he only needed his signal to broadcast his instructions, and can easily find another one.
Of the twelve signs on Trueman's wheel, only Taurus now remains. Sarah Jane and Clyde are both have Taurus as their starsign, and Sarah Jane is unable to think of anyway to stop the Ancient Lights, with only seconds remaining before she too falls under Trueman's control.
Luke realises how Clyde was freed from Trueman's control; it was when he grabbed his friend's shoulder. As Luke was not born, he does not have a starsign, making him immune to the power of the Ancient Lights. Putting his theory to the test, Luke joins the circle surrounding Trueman by linking himself with Cheryl and Gita; the people forming the circle snap out of their trance and collapse. Everyone else under Trueman's control are also freed, as he falls to his knees screaming in horror and denial. Luke explains that the circle was like an electrical circuit, and that by joining it, he was able to break it. Sarah Jane pleads with Trueman to abandon the Ancient Life and leave the theatre with them, but Trueman refuses; he cannot bear returning to his old life and chooses to become "one with the stars", disintegrating into space.
As the friends celebrate back at Sarah Jane's house, the clueless Earth authorities begin what the investigators know will be a fruitless search for Trueman. Luke and Sarah Jane decide that, since Luke was able to use his lack of a birthday to save the universe, they will take today's date as his own equivalent of a birthday.
- Sarah Jane Smith - Elisabeth Sladen
- Luke Smith - Tommy Knight
- Clyde Langer- Daniel Anthony
- Rani Chandra - Anjli Mohindra
- Martin Trueman - Russ Abbott
- Cheryl Farley - Carryl Thomas
- Haresh Chandra - Ace Bhatti
- Gita Chandra - Mina Anwar
- Linda - Joanna Bending
- George - Nicholas Osmond
- British Newsreader - Sagar Arya
- French Newsreader - Anthony Debaeck
- Trinity Wells - Lachele Carl
- Stuart Farley - Ed Hughes
- Lisa Trotter - Nicky Ladanowski
Created by Russell T Davies
|Executive Producers Russell T Davies and Julie Gardner|
|Series Producer Matthew Bouch|
|General production staff
Camera and lighting department
|Make-up and prosthetics
General post-production staff
Special and visual effects
|Not every person who worked on this adventure was credited. The absence of a credit for a position doesn't necessarily mean the job wasn't required. The information above is based solely on observations of the actual end credits of the episodes as broadcast, and does not relay information from IMDB or other sources.|
- Journalist Colm Furnish appeared on a poster advertising Trueman's show.
- Journalist Ravi Pawar attended one of Trueman's shows.
- Celestial Deidre has fallen off the stairs.
- Joanna O'Brien interviews Stuart and Cheryl Farley.
- John is one of the first humans who gets under the control of the Ancient Lights.
- Diane Cope is a woman who lives in England.
- Draconia and Ventiplex have developed a form of astrology.
- The concept of astrology first appeared in Babylon.
- Due to being artificially created, Luke has no birthday or star sign.
- Cheryl, Clyde and Gita are Geminis.
- Rani is an Ares.
- Stuart is a Scorpio.
- Sarah Jane is a Taurus.
- Trinity Wells is a Leo.
- George is a Libra.
- Sarah Jane thought Trueman might be using a bio damper.
- Haresh flicks through the channels BBC One, BBC Two, ITV 1 and Channel 5.
- Paranormal Planet was a television show on the Psychic Channel.
- RNF7 is a French television show.
- AMNN reports that the President has walked out of the White House and is apparently holding hands with the wife of the Prime Minister of Kazakhstan.
- Clyde uses the phrase "the nuts".
- The story was originally going to use the Mandragora Helix as a sequel to The Masque of Mandragora. However, it was decided that "Mandragora had to change too much and was too easily defeated in order to fit this plot", so a new foe was created instead. (DWMSE 23)
- The French news reporter originally appeared in the Doctor Who episode Army of Ghosts and again in the Torchwood episodes Children of Earth: Day Three and Children of Earth: Day Four, making him the second character to appear in both Doctor Who and its spin-offs after Trinity Wells.
- Translation of the French language news items is as follows:
|Newsreader: La situation est très confuse. Personne ne sait ce qu'il se passe, ni qui pourrait être cet étrange Anglais.||The situation is very confusing. No one knows what is going on, or who the strange Englishman could be.|
|News crawl: ...ont été hypnotisé suivant une émission télévisée imprévue. Ceux qui ont été touchés par l'émission commencent maintenant à agir...||...have been hypnotised during an unplanned television show. Those who have been affected by the programme are now beginning to...|
- As Trueman announces signs of the Zodiac coming into claim of the Ancient Lights, two are activated offscreen. These would be Virgo (♍) and Aquarius (♒).
- Barack Obama, who is the US President at the time this story was set became possessed when Trueman took control of everyone whose star sign is Cancer. In real life, Obama's star sign is actually Leo.
Part One's BBC One repeat gained 0.86 million with an AI score of 83, whilst Part Two's BBC One repeat gained 0.7 million with an AI score of 86.
- New Theatre, Cardiff
- Albert Crescent, Penarth
- When Luke begins explaining to Clyde about bio-dampeners, Clyde's arm is around Luke's shoulders but when the camera switches angles, his arm is now down by his side.
- Near the end of Trueman's ritual, Taurus (♉) can be seen lit up on Trueman's zodiac wheel before he calls the sign, unlike what happens with other signs. Taurus itself was never activated on the wheel, and the power was cut before Trueman could announce it coming under the power of the Ancient Lights.
- Sarah Jane has a flashback of her reunion with the Tenth Doctor, (TV: School Reunion) and her farewell to him after the War in the Medusa Cascade. (TV: Journey's End)
- When Sarah Jane requests Mr Smith's help, a letter with the ATMOS logo can be seen. (TV: Partners in Crime, The Sontaran Stratagem, The Poison Sky)
- Clyde recalls Luke almost causing the Moon to collide with the Earth. (TV: The Lost Boy)
- Sarah Jane tells Clyde that she knows how it feels to be possessed. (TV: Planet of the Spiders, The Masque of Mandragora, The Hand of Fear)
Home video releases
- This story, along with the rest of series 2, was released on DVD on 9th November 2009 (UK) and 10th November 2009 (North America).
- It was also released in the Complete Collection Series 1-5 boxset release (Region 2 release: 6th February 2012).
- Secrets of the Stars at Shannon Sullivan's A Brief History of Time (Travel)
- Secrets of the Stars at The Locations Guide