Visible crew/equipment: During his fistfight with the burly body guard outside Sir Norman's estate, Illya's stunt double's face is visible in profile.

Revealing: MGM often recycled props from its earlier films. Here, the head of Robby the Robot from "Forbidden Planet" is used as part of the rejuvenation machine.

Revealing: Illya's car collides with Madame de Sala's. But it's very obvious that the cars don't actually strike each other, and later shots of her vehicle show no damage at all where it was supposedly hit.

Continuity: At the end of Part 1, Sir Norman enters the rejuvenation device and immediately gets younger. As Part 2 begins, however, he emerges from the machine looking the same, and Dr. Gritsky says that his rejuvenation will occur gradually over the next few days.

Factual error: Dr. Gritsky over-rejuvenates himself at the end and turns into a young boy - who for some inexplicable reason still has the adult doctor's mustache.

Factual error: While Solo prepares the explosive, Waverly's line to Joanna is, "If you and I are wise like Lot's wife, we'd better not look." The scriptwriter got this backwards. Lot's wife was unwise and did look, and turned into a pillar of salt.

Factual error: The title of Act II, "Thrush Flaps It's Wings," is misspelled/mispunctuated. The possessive "its" does not take an apostrophe, so it should read, "Thrush Flaps Its Wings."