Other mistake: When Scott and Virgil are putting Chip to bed towards the end of the episode, the globe in Chip's bedroom is upside down.
Thunderbirds (1964)
1 other mistake in Security Hazard - chronological order
Starring: David Graham, Ray Barrett, Peter Dyneley, Shane Rimmer
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."