Captain Scarlet & the Mysterons is a 1960s British sci-fi TV series first aired by ATV Midlands on 29 Sept 1967. Characters are portrayed by marionette puppets alongside scale model sets and special effects. Set in 2068, Captain Scarlet presents the hostilities between Earth and a race of Martians known as the Mysterons. After human astronauts attack their city on Mars, the vengeful Mysterons declare war on Earth, initiating a series of reprisals that are countered by Spectrum, a worldwide security organisation. Re-run a number of times and purchased by the BBC in 1993, the 32-episode series has entailed tie-in merchandise since its first appearance. The final episode aired on 14 May 1968.