• Jodie Whitaker (The Doctor)
• Bradley Walsh (Graham O'Brien)
• Mandip Gill (Yasmin Khan)
• Tosin Cole (Ryan Sinclair)
• John Barrowman (Captain Jack Harkness)
• Chris Noth (Jack Robertson)
• Harriet Walter (Jo Patterson)
• Nathan Stewart-Jarrett (Leo Rugazzi)
• Nathan Armarkwei-Laryea (Armen)
• Helen Anderson (Rachel)
• Nicholas Briggs (voice of the Daleks)
• Barnaby Edwards and Nicholas Pegg (Dalek operators)
• Sharon D Clarke (Grace)

Cheltenham 2019: a Dalek breaks into GCHQ. However, the Doctor and friends arrive and between them defeat the Dalek. Six hours later the remains of the Dalek are being loaded up to be taken to a secret depository. En route, the driver stops off for a refill of his tea. However, after taking a drink of his tea the driver drops dead. The woman at the roadstop cafe shuts up shop, moves the body and drives off.

Some time later, Jack Robertson, Leo Rugazzi and Jo Patterson are meeting for the demonstration of a new initiative to deal with civil unrest. Police are under pressure and budgets for security are insufficient. Robertson and Rugazzi show their new security drone in action, quelling a group of rioters facing off against a police cordon: the drone is a Dalek. Armed with a water cannon, gas (harmless for the demo but in the field it will be CS gas) and a sonic deterrent it appears that the future might be a safer one, at least it will do if Jo Patterson gets into power.

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• Jodie Whitaker (The Doctor)
• Mandip Gill (Yasmin Khan)
• John Bishop (Dan Lewis)
• Nadia Albina (Diane)
• Sarah Amankwah (En Sentac)
• Jacob Anderson (Vinder)
• Robert Bathurst (Farquhar)
• Nicholas Blane (Millington)
• Heather Bleasdale (Wilma)
• Vincent Brimble (Gerald)
• Paul Broughton (Neville)
• George Caple (Alfie)
• Gunnar Cauthery (Jon)
• Gemma Churchill (Jean)
• Kammy Darweish (Kumar)
• Craige Els (Karvanista)
• Barbara Flynn (Awsok)
• Alex Frost (Reverend Shaw)
• Thaddea Graham (Bel)
• Blake Harrison (Namaca)
• Sue Jenkins (Eileen)
• Gerald Kyd (General Logan)
• Nigel Richard Lambert (Priest Triangle)
• Paul Leonard (James Stonehouse)
• Penelope McGhie (Mrs Hayward)
• Kevin McNally (Professor Jericho)
• Jo Martin (The Doctor)
• Jonny Mathers (Passenger)
• John May (Kev)
• Matthew Needham (Old Swarm)
• Steve Oram (Joseph Williamson)
• Charlie Oscar (K Toscs)
• Craig Parkinson (Grand Serpent)
• Bhavnisha Parmer (Sonya Khan)
• Chantelle Piere (Police Officer)
• Poppy Polivnick (Peggy)
• Sara Powell (Mary Seacole)
• Rochenda Sandell (Anna/Azure)
• Annabel Scholey (Claire)
• Sam Spruell (Swarm)
• Dan Starkey (Kragar/Sentarg/Shallo/Svild)
• Richard Tate (Wilder)
• Jonathon Watson (Ritskaw/Skaak/Stenck)
• Barbara Fadden, Lowri Brown, Isla Moody (Weeping Angels)

The Doctor and Yasmin pursue Karvanista to Earth to prevent the planet's destruction. However, Karvanista has come to Earth to capture a human by the name of Dan Lewis. What makes Dan so significant? Why have the Sontarans decided that now is the perfect time to attack Earth? What does Claire know and can she elude a Weeping Angel that is pursuing her? How does Swarm know the Doctor? And what is the Flux?

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The Crimean War: Dan meets Mary Seacole, a notable figure from Earth's history before he is brought back to his time for an important assignment at the Liverpool docks. Yasmin is called upon to make some repairs. And in Crimea, the British prepare to do battle with soldiers from the Eastern bloc: Sontar.

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Bel is one of the survivors of the Flux, living in the aftermath, moving from sector to sector, searching for the man she loves.

The Doctor, Yazz, Dan and Vinder hide in broken time. It is not long before they embark on a mission to rescue hostages, reset time and restore their own lives.

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In a small Devonshire village on 21 November 1967, Professor Jericho is carrying out a psychic experiment with the help of Claire Brown. The grandparents of 10 year old Peggy and other residents of the village are searching for her. Mrs Hayward warns the Reverend Shaw to count the stones - there should be 92 around the church. Any more, and The Reverend Shaw should seek out Mrs Hayward and speak to her. The Doctor, Yazz and Dan investigate the increasingly bizarre village.

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Mexico, 1904: three years after being stranded in the past Dan, Yaz and Jericho break into a tomb in order to locate a pot upon which is enscribed a clue that they must decode (before returning the pot and repairing the entrance to the tomb). In Constantinople, they ask an expert to decode the markings which should tell them the date they are seeking - getting as far as December 5th before the stall is destroyed in an explosion. Someone is determined to stop them from finding out the precise date for the end of the world.

The Doctor has been brought to Division: Awsok explains that Division was created on Gallifrey to protect the galaxy, as it grew so did the number of operatives, guiding and shaping events. Now its influence is unparalled and its reach unlimited. And so the Doctor begins to make horrifying discoveries about Division, the Flux and herself.

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As the Doctor tries to escape from Division, her friends find their way into the labyrinth of tunnels under Liverpool. Doors lead to different worlds and different times. The Sontarans have taken over Earth: sending out a message to the universe, offering all except the Rutans, an alliance. Will Earth become the seat of a new galactic empire, governed by the Sontarans, Daleks and Cybermen?

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