"Flight 104" is the 22nd episode of the Supermarionation television series Captain Scarlet and the Mysterons. It was first broadcast in the United Kingdom on 1 March 1968 (1968-03-01) on ATV Midlands, was written by Tony Barwick and directed by Robert Lynn.In this episode, the Mysterons threaten to sabotage a secret conference and take over an airliner containing Scarlet, Blue and a leading astrophysicist.