UNIT and the Doctor are summoned to a nuclear power research center located near a complex of caves; something has been slowly driving members of the center’s staff mad, one by one, and at least one spelunker has been killed in the caves. The Doctor investigates the caves for himself, uninterested in what initially seem like personnel problems at the center, and finds a living dinosaur inside them; he also discovers evidence of a bipedal reptile species, both in the caves and outside. The center’s director doesn’t believe the story he’s being told, but the Brigadier prepares UNIT to defend against a possible invasion. The Doctor is convinced that the reptile humanoids are Silurians, the original inhabitants of the Earth before a mass extinction wiped out most of the large reptile species and allowed humans to evolve and thrive. The few survivors of the event went into underground shelters, and the energy released by the research center is slowly awakening them. The Doctor is determined to contact them and try to talk them into coexisting peacefully with humans on the surface, only to find that warlike factions exist among the Silurians as well – and some of them will be satisfied with nothing less than wiping out humanity.
Guest Cast: John Newman (Spencer), Bill Matthews (Davis), Peter Miles (Dr. Lawrence), Norman Jones (Baker), Thomasine Heiner (Miss Dawson), Fulton Mackay (Dr. Quinn), Roy Branigan (Roberts), Ian Cunningham (Dr. Meredith), Paul Darrow (Hawkins), Pat Gorman (Silurian Scientist), Dave Carter (Old Silurian), Nigel Johns (Young Silurian), Paul Barton, Simon Cain, John Churchill (Silurians), Peter Halliday (Silurian voice), Nancie Jackson (Doris Squire), Gordon Richardson (Squire), Richard Steele (Hart), Ian Talbot (Travis), Geoffrey Palmer (Masters), Harry Swift (Robins), Brendan Barry (Doctor), Derek Pollitt (Wright), Alan Mason (Corporal Nutting)
Broadcast from January 31 through March 14, 1970
LogBook entry & review by Earl Green Read More