"Yesterday's Enterprise" is the 63rd episode of the television series Star Trek: The Next Generation. It was the 15th episode of the third season, first airing in syndication the week of February 19, 1990. In the story, the crew of the USS Enterprise (NCC-1701-D) must decide whether to send the time-traveling Enterprise-C back through a temporal rift to its certain destruction, to prevent damaging changes to their own timeline. The plot merged two storylines that had been developed separately, one featuring the crew of the time-traveling ship and another featuring the return of Denise Crosby (pictured), whose character had been killed in the show's first season. Trent Christopher Ganino and Eric A. Stillwell rewrote the merged story to focus on Whoopi Goldberg's character, Guinan. Filming lasted a week. In syndication, "Yesterday's Enterprise" outperformed most of the third season's episodes with a 13.1 Nielsen rating, the third-highest for the series at the time. The episode is cited as a favorite by reviewers, and is widely regarded as one of the best episodes of the series. (Full article...)