When SG-2 team "shoves" Mitchell onto the flight deck of the Prometheus, Sam-2 is missing from the right-hand seat. The view is to the right of the right-hand seat, so it is clear that Sam-2 is missing. Then in the next scene as Sam turns to look at Sam-2, suddenly Sam-2 is back in the shot.
Trivia: One of the alternate SG-1 teams had Cameron Mitchell leading a team with three Sodan warriors. They are wearing the armbands from the episode "Upgrades."
Trivia: When Dr. Lee is telling Carter about the point of convergence, an alternate Carter is seen behind him eating blue jell-o and wearing glasses. This Carter is similar to the one in the Season 8 episode; "Moebius," where SG-1 alters the timeline attempting to get a ZPM.
Carter states that gate travel is on average 0.3 seconds. However, the shortest gate travel visuals have been a few seconds at the least, and when they've tracked an object's movements through the wormhole, it took much longer than 0.3 seconds.
Differences in the universes
Bra'tac is the leader of the Jaffa
Carter is married and pregnant in at least one of them.
The Ori created a second beachhead, then destroyed most of the Jaffa strongholds.
Why did everyone in the control room look so shocked when the second alternate SG-1 walked through the gate, especially after hearing alternate Mitchell-2 on the radio?
Why didn't anyone react to the fact that the alternate SG-1 was wearing completely different uniforms (complete with the SGC insignia) from what they were wearing when they left for the mission when they first stepped through the gate (and afterwards)?
Daniel-2: (entering the bridge on the Prometheus) Where's the crew?
Mitchell: You're looking at it.
Teal'c: Given the dangers we may face, it was decided that we would proceed alone.
Mitchell-2: So if this plan goes FUBAR we're the only ones who go down with the ship?
Daniel: Well, there's plenty more where we came from, right?
Landry: You're telling me, they planned this from the get-go?
Mitchell: Yes, sir, that counts from the boom you heard and the extra energy signature the gate diagnostic picked up in the first matter stream. They opened a wormhole through the black hole and then blasted a bridge into this universe. (to Teal'C) Isn't that how Carter described it? (to Landry) I don'T know, I just remember wormhole - black hole - blast.
Kavasir: I will need the weapon back once your work here is completed. It is, after all, only on loan to you. Temporarily.
Carter: I know! You'll get it back when we're done.
Mitchell: So I'm guessing this almost feels like home, doesn't it?
Daniel-2: Almost like home...but...if it was home...I'd be sitting where you're sitting and you'd be sitting here telling me I'd love to help you but I have no idea what's going on.
Mitchell: I'm thinking one of two possible scenarios. A, Carter's right and you're from an alternate universe in which case we'll do everything we can to get you back home. Or B, you're not who you say you are. In which case we need to find out what you're really after.
Daniel-2: Actually there's a third scenario. C, you're not who you say you are and it's up to us to find out what you're after.
Daniel: Okay, so let's say we accept the possibility that this is a alternate SG-1 from a parallel universe... how did they get here?
(everyone stares at Carter)
Carter: I got nothing...
(everyone continues to stare)
Mitchell: Did she just say we?
Daniel: You just said we. You just said we?
Sam: Me and…myself. The other Samantha Carter.
Mitchell: Finally you found someone to keep up with you, huh?
Mitchell: One more stupid question. (Landry glares) Yours was fine – mine is stupid.
Kavasir: The perilous nature of this mission should not be taken lightly. There is a chance the Prometheus may not survive this voyage. But courage and a steadfast resolve will prove the most valuable asset in this undertaking. Well, good luck to you. (beams out)
Daniel: I miss Thor.
Daniel-2: Wouldn't it have been easier to zat (Mitchell)?
Teal'c-2: Easier yes, but far less gratifying.
Mitchell-2: Did he just insult me?
Landry: I am not about to turn this base into the Grand Central Station of the multiverse.
Mitchell-2: Now let me get this straight: we figured that you guys would try to escape, and we set this trap for you... not realising that you'd figure out that we'd figure you out and you set your own.
Teal'c: (looking smug) Indeed.
Mitchell: I read the mission reports on the Asgard...they're not what I expected.
Sam: What were you expecting?
Mitchell: Well, pants for one.
Mitchell: So you're saying that somewhere in an alternate universe I got to second base with Amy Vandenburg?
Mitchell: Boggles the mind, don't it?
According to Joseph Mallozzi, one of the writers of this episode, the Sam Carter from Janet Fraiser's and Martouf's reality was married to Jack O'Neill.
International Air Dates:
The Netherlands: July 28, 2007 on Veronica
Syndication Premiere: February 3-4, 2007
This episode first aired in Canada on Thursday, February 2, 2006.
This episode contained a lot of deleted scenes, some of which include our Daniel mentioning that Cassie moved in with Carter after Janet Fraiser's death, the revealing that Sha're never died and Abydos wasn't destroyed in Janet Fraiser and Martouf's reality, Daniel-2 having second thoughts about stealing the ZPM, and a lot of foreshadowing of future episodes.
Mitchell: You don't have beards so you're not from the evil twin universe.
This is a reference to the "Mirror, Mirror" episode from the original Star Trek series. Kirk, McCoy, Scotty and Uhura enter an alternate universe where the Federation is evil and warlike. The "evil" Spock has a goatee. The "evil selves have beards" continued on into other Trek franchies mirror-universe episodes, and even shows like South Park.