Science FictionDramaAdventure

Investigating mysterious power failures and a death at an underground research centre, The Doctor discovers a colony of Silurians - prehistoric, intelligent reptiles who went into hibernation before man evolved. But now they have woken up, and they are prepared to wipe out mankind with a killer plague to get their planet back.

Credits

Jon PertweeThe Doctor

Caroline JohnLiz Shaw

Nicholas CourtneyBrigadier Lethbridge-Stewart

Fulton MackayDr. Quinn

Norman JonesMajor Baker