The Armageddon Factor

Written by Bob Baker and Dave Martin

"As from this moment there's no such thing as free will in the entire universe. There's only my will, because I possess the Key to Time!"

Episode Title	Premiere Date
Episode 1	20/01/1979
Episode 2	27/01/1979
Episode 3	03/02/1979
Episode 4	10/02/1979
Episode 5	17/02/1979
Episode 6	24/02/1979

The Key to Time is almost complete. With only one piece still to find, the Doctor, Romana and K-9 arrive on Atrios, a planet in the middle of a terrible war with its twin world, Zeos. To restore the balance of the universe for the White Guardian, the Doctor must find the sixth segment before the planets destroy each other — but Zeos is deserted, so who is behind the war?

Cast & Crew

The Doctor: Tom Baker

Romana: Mary Tamm

K9 (voice): John Leeson

Marshal: John Woodvine

Princess Astra: Lalla Ward

Shapp: Davyd Harries

The Shadow: William Squire

Drax: Barry Jackson

The Guardian: Valentine Dyall

Producer: Graham Williams

Director: Michael Hayes

Scriptwriters: Bob Baker and Dave Martin