The Doctor, Jamie and Zoe find themselves inside a space beacon being attacked by space pirates. The travellers are separated from the TARDIS and flung into the depths of space.
First broadcast March 8 – April 12, on BBC 1 at 5.15pm; six parts
The TARDIS arrives on Earth where T-Mat has revolutionised travel. However, the Ice Warriors have seized control and use T-Mat to distribute Martian seed pods across the world.
First broadcast January 25 – March 1, 1969 on BBC 1 at 5.15pm; six parts
In search of the final segment of the Key to Time, the TARDIS takes the Doctor, Romana and K-9 to the planet Atrios which is engaged in a war with its neighbouring planet, Zeos.
Part 1: Looking for the final segment of the Key to Time, the Doctor and Romana arrive on the planet Atrios which is in a major nuclear war with the neighbouring world of Zeos.
Part 2: The Marshal demands that the Doctor devise the ultimate deterrent against the attacking Zeons. But who are theZeons? The Doctor and Romana begin to suspect that the Marshal is being manipulated.
Part 3: Journeying to Zeos by transmat, the Doctor finds that it is an empty world. As the Marshal prepares to launch his final attack, the Doctor meets the commander of Zeos’s forces.
Part 4: With the Marshal poised to fire upon Zeos and the Mentalis computer on a countdown to destruction, the Doctor resorts to desperate measures to prevent a cataclysm.
Part 5: The Doctor and Romana arrive in the lair of the Shadow, servant of the Black Guardian, who also seeks the Key to Time.
Part 6: The tragic truth of the sixth segment of the Key to Time is revealed and if the Black Guardian can control the Key, the whole of time and space will be plunged into eternal chaos.
Novelised as Doctor Who and the Armageddon Factor.
In search of the final segment of the Key to Time, the TARDIS takes the Doctor, Romana and K-9 to the planet Atrios which is engaged in a war with its neighbouring planet, Zeos.
First broadcast January 20 – February 24, 1979 on BBC 1 at 6.25/6.20/6.30pm; six parts
In search of the fifth segment of the Key to Time, the Doctor and Romana arrive on the third moon of Delta Magna where Romana is captured by the native, green-skinned Swampies.
First broadcast December 30, 1978 on BBC 1 at 6.15/6.30/6.25pm; four parts