Star Trek: The Next Generation, season 1, episode 7
Lonely Among Us
Summary
An alien entity possesses Dr. Crusher, Worf, and Picard while the Enterprise is transporting delegates from two feuding planets.
Summary from Wikipedia, CC BY-SA 4.0.
Find out more
These links open the services in a new tab with the question pre-filled; the AI assistants may ask you to sign in. Their answers can contain errors.