Starring: David Graham, Ray Barrett, Peter Dyneley, Shane Rimmer
Attack of the Alligators - S1-E23
Audio problem: When Culp is walking from his boat to the window outside the laboratory, some dialogue from Dr Orchard describing the theramine process can be heard in the background. When we are in the laboratory, Dr Orchard describes the process with the same dialogue soundtrack.
Revealing mistake: When the dummy plane is shot out of the sky by the fighter pilot, a piece of the plane shoots off into the top left of the screen and bounces off the sky background. (00:23:05)
Trivia: The shot of Thunderbird 2 flying in the dark is actually reused footage from a previous episode, "The Man from MI5."