Star Trek: The Next Generation: Season 3, Episode 15

Yesterday's Enterprise (17 Feb. 1990)

TV Episode  |   |  Action, Adventure, Mystery
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Reviews: 11 user | 7 critic

The Enterprise C enters the Enterprise D's time and space continuum, where they find Picard and crew in a constant state of war with the Klingons, and only Guinan knows it.



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Episode cast overview:
Tricia O'Neil ...


The Enterprise is observing a celestial anomaly, something akin to a wormhole when a starship appears having traveled through it. To everyone's surprise, the ship is an earlier version of the Enterprise, the Enterprise-C commanded by Captain Rachel Garrett. The instant the Enterprise-C arrives however, history is changed. Captain Picard and his Enterprise are battle weary with the Federation having been at war with the Klingon Empire for 20 years. Lt. Tasha Yar is alive with Lt. Worf nowhere to be found. Guinan knows something is wrong and Picard realizes that the Enterprise-C must return to its own time and place if their time line is to be restored. Written by garykmcd

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Release Date:

17 February 1990 (USA)  »

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Technical Specs


Sound Mix:


Aspect Ratio:

1.33 : 1
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Did You Know?


The ambient noise level aboard the ship was increased in the alternate time-line. Consoles and displays were made more audible, the warp engines made a dull roar sound, intra-ship communication announcements increased, the doors made a "swoosh" sound reminiscent of the sound effect used in the original Star Trek (1966) series. Set lighting was also significantly changed and darkened. See more »


When Commander Riker and Lt. Yar are performing repairs on the bridge of the Enterprise C, Tasha refers to Geordi as Lieutenant. We could assume here that in this timeline LaForge had not been promoted to the rank of Lieutenant Commander. However, in later scenes, particularly the Ready Room briefing, it is clear that Geordi is wearing the rank of Lieutenant Commander. See more »


[last lines]
Guinan: Geordi, tell me about... Tasha Yar.
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Referenced in Star Trek: The Next Generation: Redemption (1991) See more »


Star Trek: The Next Generation Main Title
Composed by Jerry Goldsmith and Alexander Courage
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User Reviews

This episode helps to establish the completely inexplicable return of Tasha Yar.
16 November 2014 | by (Bradenton, Florida) – See all my reviews

At about the end of the first season, Denise Crosby requested she be written off the show, as her part was VERY limited. I would certainly agree, as her role consisted of saying "yes, Captain", being angry or talking about the rape gangs on her home planet. Otherwise, she was a non-entity. Now, for some odd reason, she's back. I have no idea whose idea it was, but following this return, she'd be back for future episodes as well--something which never worked for me.

The Enterprise inexplicably meets a previous version of the Enterprise in space. Somehow, the old version C was transported 22 years in the future. But this isn't the only change, as apparently this time shift also completely changed the timeline--resulting in Lt. Yar being alive and well on the Enterprise D as well as a long and super-bloody war between the Klingons. 40,000,000,000 lives have been lost in this horrific fight and it's lasted since about the time the Enterprise C disappeared. In fact, they eventually come to realize that if they can send that ship back, then the timeline will change and perhaps the war will never occur at all. Oddly, Guinan realizes that there is a problem and the old Enterprise must go back--but many of the other crew members want the ship to stay and help in the hopeless fight against the Klingons.

While the episode is a very interesting what if sort of show, it also re- introduces Yar. She's actually fine here--but her eventual return as a Romulan (?!) made no sense at all and seemed contrived as well as a low- point for the series. I just wish in hindsight that they'd given Ms. Crosby better material from the start, as this weird, abortive return just felt strange and a bit silly.

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