In the second episode of the seven-part story "Doctor Who and the Silurians," a series of power failures and sudden electrical upsurges at the Wesley Moore nuclear research station uncovers evidence that an earlier, hyper-intelligent species existed on Earth before the emergence of
homo sapiens. The Doctor (
Jon Pertwee) wonders if this race was benign or malevolent. He doesn't have to wonder long: Thanks to a freak electrical charge, the reptile-like Silurians emerge from their extremely long hibernation. Written by Malcolm Hulke, "Doctor Who and the Silurians, Episode 2" first aired on February 7, 1970. Filmed in color, this episode is presently available in black-and-white only. ~ Hal Erickson, All Movie Guide