Captain Scarlet And The Mysterons, often referred to simply as Captain Scarlet, is a science fiction television series programme produced by the Century 21 Productions Television company of Gerry Anderson, John Read, Reg Hill and Sylvia Anderson. It was first shown in the United Kingdom (originally on ATV Midlands, but later the whole of the UK) between September 1967 and May 1968. It used puppetry (Super-marionation) and scale model special effects.

The series is one of several of popular science-fiction TV adventure series the Andersons produced in the 1960s, beginning with Supercar and followed by Fireball XL5, Stingray, Thunderbirds, Captain Scarlet and the Mysterons, Joe 90, and the little-seen The Secret Service. Captain Scarlet and the Mysterons was the first series made after the international success of Thunderbirds in 1964-66.