Recap / Star Trek: The Next Generation S3E15 "Yesterday's Enterprise"
Tasha! You're alive!!!
Guinan is introducing Worf to the wonders of prune juice when the Enterprise comes upon some sort of space-time disturbance. Suddenly, a ship emerges — the Enterprise-C, displaced 22 years in time. And it has survivors.

Panning back to the bridge of the Enterprise-D, things are...different. The lighting is darker, the design a bit more sinister, the uniforms are a slightly different design and Wesley is a full member of Starfleet — and holy crap, is that Tasha Yar standing there where Worf ought to be? Worf's absence is easily explained: the Federation has been at war with the Klingons for over 20 years, a war which they are now on the brink of losing. They desperately need any ship they can get, and the Enterprise-C, though badly damaged, looks repairable.

They bring the survivors on board, including the moderately injured Captain Garrett. She tells Picard and Dr. Crusher that they had been responding to a distress call from a Klingon outpost when they were set upon by four Romulan Warbirds and were moments from destruction when they fell into the rift. It's a pity, really — just think what beneficial effects a Federation rescue of a Klingon base might have had on the negotiations then taking place. Why, 20 some years of devastating war might well have been averted!

Alone of the crew of the Enterprise, Guinan has noticed that something is Wrong. She talks to Picard about it, but isn't able to give him anything more definite than that this isn't what's supposed to be happening, and implores him to send the Enterprise-C back through the rift to where it belongs. Picard is understandably reluctant to send 124 people into certain death based only on a few cryptic remarks from his bartender, but Guinan begs him to trust her. And then the Klingons turn up.

Meanwhile, Tasha has been liaising with the acting second in command of the Enterprise-C; Lieutenant Junior Grade Richard Castillo, trying to get the older vessel combat ready once more. The two of them clearly like each other, even all the very strange looks Guinan keeps giving her are a little disconcerting. Picard finally decides to send the Enterprise-C back where it belongs, on the logic that even if it is a suicide mission, Klingons have an awful lot of respect for people who die in battle, and they're all just going to get killed anyway when the present day Klingons turn up. Which they promptly do.

In the ensuing battle, both ships are badly damaged and Captain Garrett is killed by a piece of shrapnel. Tasha confronts Guinan about the aforementioned strange looks, and Guinan admits that in the "correct" timeline, she died horribly and pointlessly. Upon hearing this cheerful news, Tasha decides to transfer to the Enterprise-C and take her chances with the Romulans, where at least her death might make a difference. This couldn't possibly have any consequences down the road at all.

Those pesky Klingons still won't go away, though, and as the Enterprise-C limps back towards the rift, the Enterprise-D devotes itself wholly to defending its doomed predecessor. Harried by three Birds of Prey, and with a warp core breach imminent, it looks like the end for both ships. Just as the Enterprise-D is about to be destroyed, the Enterprise-C makes it into the rift-

...and everything returns to normal. The episode ends with Guinan glancing about a well-lit, happy Ten-Forward, and she sits down to ask Geordi about Tasha Yar.


  • Absentee Actor: Marina Sirtis (Counselor Troi) only appears in the two short bridge scenes on the "regular" Enterprise — one before and one after the main plot of the episode — and has no dialogue.
  • Anyone Can Die: The best thing about an Alternate Timeline episode.
  • Bad Present: Or Bad Future — it is a Bad Future story in everything but the fact that bad alternate time is the present from the perspective of the main characters.
  • Badass Boast: "Let's make sure history never forgets... the name... Enterprise."
  • Child Soldier: Wesley Crusher in the alternate timeline is part of the Enterprise bridge crew, showing how desperate the Federation must be getting if they're losing to the Klingons.
  • Cool Starship: The Ambassador-class Enterprise-C. Notable in that the Ambassador only made three other appearances in the franchise and it remains an extremely popular ship in the fandom.
  • Critical Staffing Shortage: Riker points out that if the Enterprise-C goes back, Lt. Castillo will have "limited support from Ops, no Tactical support, reduced staff in Engineering..." before Castillo cuts him off.
  • Defiant to the End: Picard, see "Facing the Bullets" One-Liner below.
  • Drink Order: Worf's love of prune juice begins here.
  • "Facing the Bullets" One-Liner: The Enterprise is crippled, with no chance of winning the battle. The Klingons offer to let the Enterprise surrender.
    Captain Picard: That'll be the day.
  • Fix Fic: Denise Crosby left the series unexpectedly while the first season was being filmed, which meant Tasha Yar had to be written out. Many viewers criticized Yar's demise as being abrupt and pointless. When Crosby returned for this episode, the writers got a chance to give her a more heroic death. This is lampshaded in the dialogue between Yar and Picard, when he says that instead of having a "senseless death" she wants her sacrifice to "count for something".
  • Foreshadowing: The Bad Future Enterprise-D is destroyed in the exact same way as the Enterprise-D we've been watching through the show will be: Klingon Birds of Prey damage the warp engine, which causes a warp core breach. In fact, it's so precisely identical, the same panel explodes and the core starts leaking from the same spot.
    • In fact, Geordi's dialogue is almost lifted word for word from Generations, with just the time until explosion changed between the two versions.
    • Another bonus: both this episode and Generations were directed by David Carson.
  • For Want of a Nail: The whole premise of the episode; the Enterprise-C turns out to be a very important nail indeed.
  • Getting Crap Past the Radar: And not even trying very hard. Guinan tries to talk Worf into seeking... companionship from other members of the crew. Worf states that human women are far too fragile, and that he would require a Klingon woman for... companionship.
  • Harsher in Hindsight: Tasha's daughter, Sela. Tasha Yar isn't killed when the Enterprise-C is destroyed - some survivors were brought to Romulus and kept as prisoners, including Tasha Yar. She would proceed to have a half-Romulan child named Sela, who is revealed in Star Trek Online to have gone back in time 200,000 years and instigated the Iconian War, which claimed billions if not trillions of lives as well as causing the Hobus Supernova which destroyed Romulus.
  • Heroic Sacrifice: The original fate of the Enterprise-C, fighting four Romulan warbirds in defense of a Klingon colony before the Klingons and Federation were allies. Also the fate of the Bad Future's Enterprise-D.
  • Hold the Line / Last Stand: The Enterprise-D has to hold off three Klingon Birds-of-Prey long enough for the Enterprise-C to re-enter the temporal rift and reset history. Similarly, the Enterprise-C has to last long enough in the Battle of Narendra III to prove to the Klingons that the Federation are True Companions.
  • In Spite of a Nail: Played with. Starfleet is in a hopeless war against the Klingon Empire, without any civilians aboard the Enterprise except Guinan, but most of the crew we know is there, though Wesley in this reality is an actual ensign instead of an "acting ensign" as he was at the time.
  • Mildly Military: The fact that this trope is Averted is one of the earliest indicators to the audience that something is off. All of the crew carry phasers aboard the ship, the lighting is dimmed for a darker mood, the ramp leading to the back of the bridge has been replaced with steps, fewer chairs on the Bridge for officers to lounge in (Riker now stands behind the railing instead of sitting at the Captain's side), the replicators produce standardized military rations, the ship doesn't have a counselor on the bridge — Troi doesn't appear in the Bad Future at all — and the Enterprise is even repeatedly referred to as a "battleship" instead of a "starship". The Enterprise-C, meanwhile, is referred to as a cruiser. Even the uniforms are slightly different, now having a closed collar to make the final frontier just that ever bit less friendly.
    • There's also the frosty interaction between Picard and Riker. Riker is not referred to as "Number One" in this timeline, and on more than one occasion bluntly challenges Picard's decisions in front of the crew. Picard is noticeably more emotionally removed from the other officers, giving the atmosphere on the ship more of a tense feeling.
  • Mundane Made Awesome: Prune Juice... A Warrior's Drink!
  • My Significance Sense Is Tingling: Guinan senses that something's wrong when the Negative Space Wedgie first appears, and it gets worse when the timeline changes. It also flares up whenever she's near Tasha, since she's supposed to be dead.
  • Negative Space Wedgie: Apparently caused by all the weapons discharges during the Battle of Narendra III.
  • Oh Crap!: LaForge delivers a well-warranted one. Doubly warranted if you consider that the Enterprise's plasma coolant is horrifically corrosive to organic matter.
    LaForge: "Coolant leak! Bridge, we've got a coolant leak in the engine core! I can't shut it down, I estimate two minutes until a warp core breach!"
  • Reset Button Suicide Mission: The Enterprise-D sacrifices itself to cover the return of the Enterprise-C back to its original time in order to prevent the alternate timeline it emerged into from occurring.
  • Ripple Effect Indicator: Worf departs for the bridge. Time Ripple ensues, and we cut to Tasha Yar (having died previously on the show) on the bridge in Worf's place. Once the timeline is restored, Worf is back where he should be.
  • Ripple Effect-Proof Memory: Guinan only, and downplayed at that: She doesn't seem to know exactly what's wrong with the timeline ("I know it's the same bridge; I also know it's wrong!"), but she had a good idea of how to fix it.
  • Sacrificial Lion: One for each space battle shown: Captain Garrett and Commander Riker.
  • Set Right What Once Went Wrong: The Enterprise-C's mission. The crew of the Enterprise-D set forth to help them and protect them until they can go back.
  • Status Quo Is God: Obviously done so we could have a cast we're familiar with, but given that the premise involves the prior 20 years of history to be drastically different, with the Federation entangled in a decades-long war, it's highly improbable that any of the original crew would have ended up on the Enterprise-D, and especially unlikely that more than one or, at most, two, would have. Instead, with the exception of Worf's swap with Yar (due to the Klingon war), and Troi, everyone else is not only stationed on the same exact ship, but also in their exact same positions.
  • Trademark Favorite Food: As noted above, in the teaser to this episode Guinan introduces Worf to the wonders of prune juice which he immediately dubs "a Warrior's Drink". Prune Juice will remain his drink of choice all the way through his time on Star Trek: Deep Space Nine.
  • What Happened to the Mouse?: Whatever became of Tasha Yar after going back into the past? This question gets answered later on in the show.
    • Meanwhile, no mention is made in the Bad Present of Mr. Worf, who quietly disappears between scene changes once the Negative Space Wedgie appears (the last we see him is when he departs for the bridge, we won't see him again until they Set Right What Once Went Wrong, when he is seen on the bridge as if had just arrived).
      • The novel Q Squared provides part of answer to this: Worf is rescued by his own people and grows up "standard" Klingon. The treason charge isn't slapped on himself and Kurn since, with Mogh as an active House, they don't make quite as convenient scapegoats. Worf becomes captain of a warship and a celebrated destroyer of Federation ships. The novel also explains Troi's disappearance from the episode as well: the Betazoids had been wiped out by the Klingons.
      • Unnecessary, since there's no need for a ship's counselor on a militarized warship anyway.
    • The shooting script had indicated that it could have been Worf on the other end of the commline, instead of a random Klingon. One wonders why they changed their mind.
  • What You Are in the Dark: Inverted. If the Enterprise-D is successful in helping the Enterprise-C return to their time, the crew of the Enterprise-D will have no idea what they did and what it meant for the Federation. They still do it, because it's the right thing to do. Although, back in the in fixed timeline, Guinan knows and later tells Picard.
  • With All Due Respect: Riker to Picard in regards to sending the Enterprise-C back through time to correct the past that altered the present.
    "With all due respect, Sir, you'd be asking 125 people to die a meaningless death."
  • You Already Changed the Past
  • You Are in Command Now: Lt. Castillo, the only remaining bridge officer, takes command of the Enterprise-C after Captain Garrett is killed.
  • You Shall Not Pass: The Enterprise-D's Heroic Sacrifice to allow the Enterprise-C to get back to her own time.
    Captain Picard: Attention all hands. As you know, we could outrun the Klingon vessels. But we must protect the Enterprise-C until she enters the temporal rift. And we must succeed. Let's make sure history never forgets... the name... Enterprise. Picard out.
    • And of course, once the timeline is restored, the final fate of the Enterprise-C, destroyed after taking on four Romulan warbirds in defense of a Klingon colony. Never forget the name Enterprise indeed.