Star Trek: The Next Generation - The Mind's Eye

 

Season four, episode 24. Aired May 27, 1991. Geordi has been brainwashed by the Romulans. The Manchurian Candidate remake.

https://en.wikipedia.org/wiki/The_Mind%27s_Eye_(Star_Trek:_The_Next_Generation)

https://www.avclub.com/star-trek-the-next-generation-the-minds-eye-in-the-1798167167

https://memory-alpha.fandom.com/wiki/The_Mind%27s_Eye_(episode)