The Silurians are a fictional race of reptile-like humanoids in the long-running British science fiction television series Doctor Who. The Silurians were Earth's first sentient species, were scientifically advanced, and lived during prehistoric times. At some point, the Moon approached close to Earth, threatening to cause geological upheaval, and the Silurians went into self-induced hibernation to survive.
Doctor Who and the Silurians: 31 January–14 March 1970
Warriors of the Deep: 5–13 January 1984
The Hungry Earth/Cold Blood: 22–29 May 2010