STORY
The Doctor is recovering from the effects of his latest body change. Meanwhile, a robot breaks into a top-secret government establishment and steals the plans of a new Disintegrator Gun. The Doctor investigates and traces the crime to a group of dissident scientists known as Think Tank who, led by the formidable Miss Winters, are planning to take over the world. To do this they are using a robot designed by Professor Kettlewell, who pretends to oppose them but is really on their side. The Think Tank steals a Destructor Code which will enable them to launch a nuclear missile attack and start the Third World War. UNIT attacks the bunker where they are fortified. In an attempt to protect its masters the robot kills Kettlewell and goes berserk. An infusion of energy provided by the Disintegrator Gun makes it grow to enormous size. The Doctor arrives in time with a metal virus which destroys the robot. Harry Sullivan joins the Doctor and Sarah as they leave in the TARDIS.

CAST

COMPANIONS & CHARACTERS
 

VILLIANS

Tom Baker as:

THE DOCTOR
 

Michael Kilgarriff as:

THE ROBOT

         

Elisabeth Sladen as:

SARAH JANE SMITH
 

Patricia Maynard as:

MISS WINTERS

         

Ian Marter as:

HARRY SULLIVAN
 

Alec Linstead as:

JELLICOE

         

Nicholas Courtney as:

BRIGADIER
     
         

Edward Burnham as:

P. KETTLEWELL
     
         

John Levene as:

RSM BENTON
     

 

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