[Nate the Great]

DATA: I have found the quantum flux in Worf's cellular RNA extends to the subatomic level. It is asynchronous with normal matter. In essence, Captain, Mister Worf does not belong in our universe.
RIKER: What?
DATA: All matter in the universe resonates on a quantum level with a unique signature. That signature is constant. It cannot be changed through any known process. It is the basic foundation of existence.

I like it that they can explain this so easily. And thank goodness we don't have to worry about Worf being thought to be insane anymore.

WORF: If I may inquire, sir, how long have you been Captain of the Enterprise?
RIKER: Four years. Ever since Captain Picard was killed in the incident with the Borg.

Which raises the question of why Shelby isn't First Officer. And for that matter, how The Best of Both Worlds ended in victory. Was his assimilation in that universe just a little more involved and irreversable?

HELM: (a Cardassian) Aye, sir.

The idea that there's a universe where the Bajorans and the Cardassians held the opposite positions raises a LOT of further questions. Did the Bajorans occupy the Cardassian Empire (very unlikely)? Did the Prophets convert the Cardassians to peace when the Bajorans turned away from them?

CRUSHER: And Geordi's visor somehow triggered that effect?
DATA: Exactly. The visor uses a subspace field pulse. I believe that whenever Geordi came near Worf, the field pulse intensified the quantum flux and pushed Worf into another reality.

Which introduces more questions such as why the visor needs a subspace effect and how often the thing cycles enough to trigger a jump.

TROI: What about our children?
WORF: Children?
TROI: You didn't know?

I feel that this bit was unnecessary. If they're on board why wouldn't they have appeared by now, and if they're not why would Deanna bring this up? I suppose the implication is that since the visor is offline Worf won't be making anymore jumps, so Deanna thinks that this Worf is here to stay.

WORF: When the last shift occurred in Sickbay, we did not have any children.
TROI: We have a little girl, Shannara, she's two years old, and a three year old boy, Eric Christopher.

So they got pregnant almost immediately? Does this even allow for the six month trial period before he talked with Will?

WORF: What about Alexander?
TROI: Alexander?
WORF: He was my son in another reality.

I suppose you could argue that in this reality the T'Ong was destroyed somewhere making the events of "The Emissary" not happen.

WORF: Sir, the Bajorans?
TROI: Ever since the Bajorans overpowered the Cardassian Empire, they've become more and more aggressive.

And we have more questions. It's been made clear that most Bajorans don't care about what happens outside their system. Remember that before the wormhole nobody cared about them except the Cardassians. With aggressive Bajorans and no Sisko one can presume that the wormhole hasn't been discovered in this reality. So where are the Bajorans getting resources for their ships?

DATA: The barriers between quantum realties are breaking down. Other realties are emerging into our own.
('and thick and fast they came at last, and more, and more, and more')

Chakoteya is quoting from "The Walrus and the Carpenter". One presumes that he's just showing off like I do from time to time.

DATA: The rate of quantum incursions is increasing exponentially. At this rate, the sector will be completely filled with Enterprises within three days.

Putting aside how an anomaly that's randomly spitting out Enterprises isn't making any of them overlap and go boom, what counts as "completely filled"? Bare hull against bare hull, or treating the shield bubbles as gumballs in a machine?

(a bad signal and a Riker with a full ragged beard)
RIKER [on viewscreen]: We won't go back. You don't know what it's like in our universe. The Federation's gone, the Borg is everywhere! We're one of the last ships left. Please, you've got to help us!
RIKER: I'm sorry, there's no choice. If this works, everything will return to
RIKER [on viewscreen]: No, we won't go back!

A big problem with this premise is how the Enterprise can survive without support for four years. And why the Borg haven't destroyed them, for that matter.

WORF: Deanna. You do not have to leave.
TROI: Oh?
WORF: I have not had dinner. Would you care to join me?
TROI: I'd love to.
WORF: Champagne.

Like I've already said, I never liked the Worf/Troi romance. It never made sense. They want different things. Furthermore, she's already established herself as a necessary component of Alexander's life. If things go south (which they will in the novel Imzadi II) and she leaves, Alexander will suffer.

(Oh, and Worf should've asked for two champagnes, too).

The Fiver

Worf: (swaying) I feel dizzy. Wait a minute -- Geordi, weren't you and and Data just on opposite sides of this console?
La Forge: We're playing "musical stations."
Worf: But where is Captain Picard?
Data: He failed to find a station when the music stopped.

Ha ha.

Crusher: "This trophy is hereby awarded to Worf for his shameful loss, terrible bat'telh skills, and really bad goatee. Ha ha, Worf."
Worf: That's a lie! My goatee looks great!

Over at TV Tropes we call this "Comically missing the point."

Memory Alpha

* Tasha was going to appear, but they didn't want to step of "Yesterday's Enterprise"'s toes. Frankly I would've kept her and ditched the whole Worf/Troi thing.
* This was still in the "you have to pay to use Happy Birthday" era, so they had to substitute For He's a Jolly Good Fellow. I understand, but I still hate that "no word for jolly" joke.
* Only appearance of a Cardassian in a Starfleet uniform until Discovery.
* Frakes also hated the Worf/Troi relationship.
* Roberto Orci cited this episode as an excuse for the Prime and Kelvinverse universes existing simultaneously. I feel that this isn't needed, we've seen enough "small change makes new timeline" alternate realities going all the way back to TOS.

Nitpicker's Guide

* How come Worf's the only thing on the shuttle to bounce around between realities? His uniform and trophy were there, too.
* Phil also brings up Troi's fragility, and specifically wonders if she'd allow Worf to dig his fingernails into her palm as part of the mating ritual.
* Despite being on the Cardassian border, the Argus Array can somehow take pictures of Utopia Planitia, which is around Mars!
* Phil thinks that the exposion of the Borg-rattled Enterprise should've damaged some of the ships around it.
* When Worf unwraps the painting he's holding it with a certain edge up. Then Deanna takes it and flips it over, indicating that she thinks it looks better that way. But then when we see it on the wall it's in the original orientation. Oops.