• Nicholas Courtney....Brigadier Lethbridge-Stewart(1968-1975, 1983, 1989)
• John Levene....Sergeant Benton (1968-1975)
• Caroline John....Liz Shaw (1970)
• Katy Manning....Jo Grant (1971-1973)
• Richard Franklin....Captain Yates (1971-1974)
• Roger Delgado....The Master (1971-1973)
• Elisabeth Sladen....Sarah Jane Smith (1974-1977)

Episode List

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• Spearhead from Space

  While the doctor is trying to sort out his regeneration, aliens are substituting autons for key government persons as a prelude to invasion.

• The Silurians
• The Ambassadors of Death
• Inferno
• Terror of the Autons
• The Mind of Evil
• The Claws of Axos
• Colony in Space
• Episodes, continued

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