"Spectrum Strikes Back" is the ninth episode of Captain Scarlet and the Mysterons, a British 1960s Supermarionation television series co-created by Gerry and Sylvia Anderson. Written by Tony Barwick and directed by Ken Turner, it was first broadcast on 24 November 1967 on ATV Midlands.Following the events of "Operation Time", in this episode Spectrum unveils two defences that it has developed against the Mysterons.