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.
Audio problem: As John and Gordon are fitting the new component on Thunderbird 5, John says, "It looks like we'll be another two hours before we're back in business. In the meantime, International Rescue is non-operational." But he is voiced by David Graham, not Ray Barrett.
Trivia: The shot of Thunderbird 2 flying in the dark is actually reused footage from a previous episode, "The Man from MI5."