Star Trek: The Original Series, season 3, episode 9
The Tholian Web
Summary
Captain Kirk is caught between dimensions while the Enterprise is trapped by an energy draining web spun by mysterious aliens. The two-part Enterprise episode "In a Mirror, Darkly" serves as a sequel to this episode.
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.