The Perils of Penelope - S1-E3
Other mistake: When Virgil enters Thunderbird 2, there are no pods to the left of Pod 3.
Thunderbirds (1964)
1 other mistake in The Perils of Penelope
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: Jeff Tracy's five sons were named after Mercury astronauts - Scott Carpenter, Virgil Grissom, Alan Shephard, Gordon Cooper and John Glenn.