Trump card
Referenced in a couple of behind-the-scenes documents from the making of , a trump card is, in many trick-playing card games, a playing card of a suit that has been chosen to outrank all other suits.

In a stage direction from the final revised draft script of , Lenore Karidian was referred to as playing her trump card when she offers for the Karidian Company of Players to stage a  onboard the  in exchange for safe passage to Benecia.

In the story outline for , Janice Lester (then called "Janice Lisette"), in the body of James T. Kirk, was described as playing her trump card with Dr. Coleman by promising to make him the Enterprises surgeon if he secretly helped her execute Kirk, who was meanwhile occupying Janice's body.

Unused production material