Star Trek: The Animated Series

The Time Trap (1x12)

Air date: Nov 24, 1973

The U.S.S.Enterprise is sent on a mission to explore a "Bermuda Triangle of Space," only to find itself and a Klingon battlecruiser trapped in a time warp after being caught in an ion storm. The two ships must cooperate before their only exit back to real space closes for good. This Delta Triangle is inhabited by other lost ships, many centuries old.