Revealing mistake: When the main character proclaims, ".the new Walter Bedeker!" you can see the frames are running back and forth. You can tell by looking at the window curtains behind him.
The Twilight Zone (1959)
1 revealing mistake in Escape Clause - chronological order
Stopover in a Quiet Town - S5-E30
Visible crew/equipment: When the camera pans to Rod Serling for his opening narration, you can very briefly see several crewmembers and some backstage equipment.
[A bomb in Wadsworth's room is seconds from going off, causing the Chancellor to panic].
Chancellor: Please, please let me out. In the name of God, let me out. Let me out! Let me out!
Wadsworth: Yes, Chancellor. In the name of God, I will let you out.
Trivia: Producer William Froug rejected an extremely nervous young singer/actress auditioning for the part of Mary Rachel, and recalls thinking that "I'll probably kick myself. She'll probably be a big star." He turned out to be right on both counts. The aspiring young singer's name was Liza Minnelli.
Mr. Dingle, the Strong - S2-E19
Question: What was the reason for giving Mr. Dingle super strength?
Answer: It's explained in the episode. The aliens are experimenting to see how humans react to various scenarios. This just happens to involve them using super strength.
Thanks. It's been a long time since I saw the episode so I forgot.