"Operation Time" is the eighth episode of the British Supermarionation television series Captain Scarlet and the Mysterons. First broadcast in the United Kingdom on 17 November 1967 on ATV Midlands, it was written by Richard Conway and Stephen J. Mattick and directed by Ken Turner. In this episode, a Mysteron vow to "kill time" confuses Spectrum until the target is discovered to be a military general who is due to receive revolutionary neurosurgery. The Mysteron weaknesses discovered in "Operation Time" are developed in "Spectrum Strikes Back", its sequel episode.