The Mind’s Eye, TNG 4
Okay, so it is a rip off of The Manchurian Candidate with a little Clockwork Orange thrown in there, too. How is this a bad thing? LaForge is used as a Romulan pawn to break the Federation-Klingon alliance. Oh no! Don’t worry Data will save the day. And since Klingons will be on board, we’ll get to see some indignant Worf action. Solid stuff.