28 December 1974
Nicholas Courtney (Brigadier Lethbridge-Stewart), John Levene (Sergeant Benton), Patricia Maynard (Miss Winters), Michael Kilgarriff (Robot), Edward Burnham (Professor Kettlewell), Alec Linstead (Jellicoe), Timothy Craven (Short) .
|Written by||Terrence Dicks|
|Directed by||Christopher Barry|
|Produced by||Barry Letts|
Mortally weakened by the Spider Queen on Metebelis III, The Doctor is forced to regenerate. His recuperatedition is cut short as UNIT investigates a spate of robberies involving components for a top-secret disintegrator gun. The culprit is quickly identified as a highly sophisticated robot built by Professor Kettlewell, being ordered to act against its Prime Directive.
Just how is the robot being used to carry out the sinister agenda of the Scientific Reform Society? Can The Doctor rescue Sarah from the robot’ clutches and avert a nuclear war?.
As a consequence of the above point, this was the first colour serial to be recorded entirely on videotape. (the Fourth Doctor Handbook)
Parts of this story were recorded at the same time as parts of Planet of the Spiders.