First one the comes to mind . . . "Double Red Alert!"
Which episode was that in? Makes me think of "Double Secret Probation."[/QUOTE]
"Double Red Alert" was from Conscience of the King, delivered by Capt. Kirk when Lenore Karidian put a phaser, set on overload, in the vent in Kirk's cabin - in order to eliminate him as one of the few remaining witnesses who can identify her father as Govenor Kodos of Tarsus IV.