Traitor is an episode from the Captain Scarlet And The Mysterons television series.
"The Spectrum organisation will be torn apart from within. The traitor among you will create havoc and destroy morale."
Spectrum Hovercraft 6 is inexplicably destroyed at Koala Base, a cadet school in Australia. Captain Scarlet and Captain Blue are assigned to investigate the possibility of sabotage from within Spectrum itself, but it seems the latest Mysteron threat has caused a high level of mistrust and paranoia - and soon Captain Scarlet finds himself being charged with being the traitor....