
Worf is on his way home from a Bat'leth Tournament where he's won first place, but is dreading his return as it is his birthday and he fears the crew has a surprise party awaiting him.
Sure enough, he turns out to be right as Riker had organized a party of Worf much to Worf's annoyance. (Or perhaps is restrained delight.) Almost right away Worf begins to notice odd things happening around him, small changes to circumstances. First he notices his birthday cake is a white cake when earlier when he cut into it it was chocolate; then he's greeted by Picard when Worf had initially been told Picard couldn't attend. Worf mostly seems to shrug off these oddities and takes part in the party and later his duties as the ship investigates problems with a Starfleet deep-space telescope array. As the investigation continues the changes become larger and harder to ignore, people changing positions around Worf suddenly and before long entire conversations that Worf had been part of seemed to have never happened at all.
It comes to a crisis point when Worf suddenly finds himself at tactical with unfamiliar configuration, the ship is attacked and takes damage, but Riker is quickly able to fight off their attackers. Worf relieves himself of duty and goes to his quarters where he's soon greeted by a very talkative, and intrusive, Counselor Troi who begins to act more intimate with Worf than he is used to, Troi wonders why her behavior is so odd for a wife. This naturally comes as a shock to Worf and he tells Troi about the odd things around him and how no one will believe him, Troi assures him she believes him and will help him to a solution.
They take problem to Data who in talking with Worf is able to get a theory going and thinks events might be tied to Geordi, when they go to visit Geordi sickbay they find him dead from injuries sustained in the earlier attack, nevertheless they find a connection between Worf's odd experiences and Geordi's VISOR. Data is soon able to come up with a theory on what is happening.
Building on the theory that for every action there's nearly an infinite possible reactions, no one reaction takes place. They all take place, each circumstance building into its own universe. Worf, somehow, is traveling between these universes after being exposed to a "rupture" in the barrier between realities in the shutlecraft. Geordi's VISOR was able to "kick" Worf into another reality. Data believes it's possible for them to find the rupture, find Worf's true reality, and return him to it.
At the fissure as the ship searches for Worf's proper reality the ship is attacked and this causes an instability in the rupture that causes other Enterprises to arrive in the area. Data believes if they're able to find the Enterprise from Worf's reality, get their shuttlecraft, and send Worf back through the fissure it should restore all universes to normal.
They do, he goes, and it happens.
Back on the "correct" Enterprise Worf finds everything returned to normal and that in his reality, Riker did not plan a surprise party; though he is greeted in his quarters by Troi and Worf seems to take steps to begin a more romantic relationship with Troi by inviting her for dinner and champagne.
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This is one of the better, and more convoluted, episodes of Season 7.
The episode was written by Brannon Braga and really shows the signs in it of the problems we'd run into with Voyager (and the rest of this season) of things not making sense and sometimes the scope of an idea being good but then bogged down by technobabble and it not making much sense under scrutiny. It's by no ,eams the worst example of this and, infact, it's one of the better (if not best) episode when it comes to these Braga tropes but all of the hallmarks are there that'll later bring us much greater turds during Voyager's run. Where sometimes the scope of the "idea" takes precedence over things making any lick of sense.
Here things don't make sense in "how" Worf is traveling between realities? "Uhhh... a fissure and Geordi's VISOR!" isn't a good enough explanation. Why is Geordi's VISOR giving off a significant subspace field? I mean it likely gives off *some* tiny field with its circuitry since computers int he 24c work on a FTL speed, but I don't see how the VISOR would give off enough of a field to kick Worf into another universe simply by Geordi entering the room. Why does entering the fissure suddenly return all of the Enterprises to the proper universes? Why does the problem in the fissure pull Enterprises from all over into this universe? (Don't tell me all of these Enterprises just happened to be in the area of the fissure in their own universe, since the Borg-battled Enterprise obviously wouldn't have been.) Since there's "nearly an infinite" number of quantum realities it seems awfully damn lucky the "right" Enterprise was pulled into this universe within moments of the fissure's rupture rather than days, weeks, years or eons from now.
Again, all of the hallmarks of a Braga Illogical episode are here, it just happens to get some hand-waving as it's actually a decent episode.
It seems odd that certain aspects of the universe properly "escalate" and never "backtrack." The first changes are small and minor, then bigger things change, then once Picard is dead and Riker is in command Picard never reappears, once Worf is married to Troi, that never goes back, once Geordi is dead he never comes back. What a dramatically convenient escalation of changes!
So, wait, Troi and Worf got married and they moved into... Worf's tiny junior officer's quarters and not Troi's larger more elaborate quarters her profession apparently affords her? And why does it matter that Worf "locked" the door? If they're her quarters shouldn't she be able to "unlock" the door and enter it no matter what?
Why is the shuttlecraft in the "proper" universe on the proper ship? Why didn't it switch into at least the first alternate universe along with Worf? It seems suggested that Worf is physically moving between universes, since he can be scanned and it can be determined he's from a different universe. But is portrayed it seems he simply "inhabits" ("Quantum Leap" style) the new universe's Worf, hence he's in that Worf's clothes and all.
Ugh.... Honestly I can nit-pick this all day long, Again, Braga episode.
But it is a good one, and there is some enjoyment here. Even if it starts that absurd and soon forgotten romantic relationship between Worf and Troi.
I also liked seeing Wesley back on the ship as the Tactical Officer, and some nice emotional stuff with Riker being in command following the loss of Picard in the Borg incident, and Riker's talk with "our" Picard was nice. It was also an interesting touch to see the Enterprise from a universe where the Borg succedded in taking over the Federation. Though one does wonder how the ship has remained more-or-less held-up and functional over the last few years and how Riker, Worf, and any other crewmembers are even beginning to function on any level on that ship.
Ok, I'm done. I'm over thinking this episode, I know it. But, dammit, Braga!