23 February 1974
Duncan Lamont (Dan Galloway), John Abineri (Richard Railton) [1-2], Neil Seiler (Commander Stewart) [1-2], Julian Fox (Peter Hamilton), Joy Harrison (Jill Tarrant), Mostyn Evans (High Priest) [1-2], Michael Wisher (Dalek Voices), John Scott Martin, Murphy Grunbar*, Cy Town (Daleks Operators), Arnold Yarrow (Bellal) [2-4], Roy Heymann (Gotal) .
|Written by||Terry Nation|
|Directed by||Michael E. Briant|
|Produced by||Barry Letts|
In this exciting space adventure The Doctor is forced into a desperate race against time.
An inexplicable power-loss strands the TARDIS on the sinister planet Exxilon where The Doctor meets an expedition from Earth seeking a rare material that can cure the virulent space plague that threatens all human life throughout the galaxy. Nearby, Sarah discovers a mysterious, living Citadel but is captured by the savage Exxilons who prepare her for sacrifice.
The Doctor must uncover the secrets of the ancient Exxilon City, locate the source of the power-drain, save Sarah and help the Earth expedition. But his plans are threatened by new arrivals on the planet – The Doctor’s oldest and deadliest enemies – The Daleks!