Star Trek: The Next Generation (1987)

Timescape - S6-E25

Revealing mistake: As Picard goes to check the fuel consumption logs his right hand is in a closed fist. When he sits at a console and uses his right hand it already has the long nails he will get in the next few minutes when he reaches for the rotten fruit. (00:11:00)

DJH747

Deja Q - S3-E13

Picard: Return that moon to its orbit.
Q: I have no powers! Q, the ordinary!
Picard: Q, the liar! Q, the misanthrope!
Q: Q, the miserable! Q, the desperate! What must I do to convince you people?
Worf: Die.

Trivia: Another joke from the set designers: whenever someone is in the Jeffries Tubes, you will see several pipes on the walls labeled "GNDN" this stands for "Goes Nowhere, Does Nothing."