S12:E01 - Robot (Pt. 1)
UNIT are called in when top secret plans are stolen from high security establishments.
S12:E02 - Robot (Pt. 2)
Harry Sullivan is sent to infiltrate Think Tank to discover the truth.
S12:E03 - Robot (Pt. 3)
Sealed inside an underground bunker, Miss Winters issues her demands to the world.
S12:E04 - Robot (Pt. 4)
The Doctor races to avert a nuclear holocaust. The robot takes Sarah hostage.
S12:E05 - The Ark in Space (Pt. 1)
The survivors of Earth lie in hibernation but the Doctor finds there has been an intruder.
S12:E06 - The Ark in Space (Pt. 2)
The survivors of the human race start to awaken. But The Doctor is concerned...
S12:E07 - The Ark in Space (Pt. 3)
Humankind faces total destruction. Can the Doctor defeat the Wirrn?
S12:E08 - The Ark in Space (Pt. 4)
Trapped by the Wirrn, The Doctor and his friends are forced into one last terrible gamble.
S12:E09 - The Sontaran Experiment (Pt. 1)
Arriving on Earth, the Doctor, Harry and Sarah meet a group of stranded human colonists.
S12:E10 - The Sontaran Experiment (Pt. 2)
Sarah has been captured by Styre who is conducting experiments on the captured humans.
S12:E11 - Genesis of the Daleks (Pt. 1)
The Time Lords send the Doctor to Skaro shortly before the creation of the Daleks.
S12:E12 - Genesis of the Daleks (Pt. 2)
In the Thal dome, Sarah is forced to load a war rocket with radioactive explosives.
S12:E13 - Genesis of the Daleks (Pt. 3)
The Doctor informs the Kaleds of Davros's experiments but Davros takes drastic action.
S12:E14 - Genesis of the Daleks (Pt. 4)
The Kaled dome is destroyed by the Thals' rocket but Daleks appear and a massacre begins.
S12:E15 - Genesis of the Daleks (Pt. 5)
Davros interrogates the Doctor, forcing him to reveal the future of the Daleks.
S12:E16 - Genesis of the Daleks (Pt. 6)
The Kaled elite move to prevent the development of the Daleks but is it already too late?
S12:E17 - Revenge of the Cybermen (Pt. 1)
The Doctor, Sarah and Harry return to Nerva, but at an earlier point in time.
S12:E18 - Revenge of the Cybermen (Pt. 2)
Sarah is the latest victim of the space plague.
S12:E19 - Revenge of the Cybermen (Pt. 3)
The Cybermen who are intent on destroying Voga.
S12:E20 - Revenge of the Cybermen (Pt. 4)
Their plan to blow up Voga thwarted, the Cybermen intend to crash Nerva into the planet.