Crater 101

"Crater 101" is the 21st episode of Captain Scarlet and the Mysterons, a British Supermarionation television series created by Gerry and Sylvia Anderson and filmed by their production company Century 21 Productions. Written by Tony Barwick and directed by Ken Turner, it was first broadcast on 26 January 1968 on ATV Midlands.

Set in 2068, the series depicts a "war of nerves" between Earth and the Mysterons: a race of Martians with the power to create functioning copies of destroyed people or objects and use them to carry out acts of aggression against humanity. Earth is defended by a military organisation called Spectrum, whose top agent, Captain Scarlet, was killed by the Mysterons and replaced by a reconstruction that subsequently broke free of their control. Scarlet's double has a self-healing power that enables him to recover from injuries that would be fatal to anyone else, making him Spectrum's best asset in its fight against the Mysterons.

"Crater 101" is the second part of a three-episode story arc that begins in "Lunarville 7" and concludes in "Dangerous Rendezvous". The plot of the episode sees Scarlet, Captain Blue and Lieutenant Green set out to destroy a Mysteron installation being built on the far side of the Moon. The events of "Crater 101" are recalled in flashback in the series' clip show finale, "The Inquisition".

The episode is one of four that were later re‑edited and combined to create Revenge of the Mysterons from Mars (1981), a Captain Scarlet compilation film produced by the New York office of distributor ITC Entertainment.