The alternate team are sent to Chulak to recruit Teal'c and fix the timeline, but run into trouble when they are captured by Apophis.
Last appearance of Major Charles Kawalsky, Apophis and Major Paul Davis. This also marks O'Neill's final episode as a regular cast member, though he makes several guest star appearances in the final two seasons.
Third of three Series Fauxnales.
This episode introduces the Ancient ZPM technology.
"Moebius, Part 2" provides examples of the following tropes:
- Actor Allusion: Possible allusion to MacGyver (1985) when Alt-Carter tells Alt-O'Neill that she doesn't like guns. O'Neill replies that he doesn't either, just like his former character.
- Agony Beam: Apophis tortures alternate Daniel with the hand device.
- Back for the Finale: General Hammond, Major Kawalsky, Apophis and Major Davis all make appearances, as this episode was initially envisioned as the series finale.
- Alternate Daniel and Carter are both made to wear the same dorky-looking helmets that they did in early episodes of the series.
- O'Neill asking Daniel if he has the address to get back home as the alternate team prepares to go through the gate is a reference to the original movie, when Daniel didn't know the return address and had to figure it out on the other side.
- McKay christening the Time Jumper the "Gateship" and the reactions of the others is a call back to an almost identical conversation from the Atlantis premiere.
- Close-Enough Timeline: This is O'Neill's response at the end of the episode when the team have supposedly restored the timeline, except for the fact that there are now fish in his pond.Carter: Didn't that tape say there were no fish in your pond?O'Neill: Close enough.
- Cunning Linguist: Alternate Daniel invokes this to try and persuade Hammond that he could be useful to the team going through the gate, which may also be a lampshading of the fact that his linguistic skills are hardly ever needed on the show due to the fact that all the aliens speak English.
- Curse Cut Short: When the alternate team is greeted by a Goa'uld shock grenade after arriving on Chulak:Alt!O'Neill: Aw, shi—
- Dead Alternate Counterpart: The episode has some fun playing with this trope. Of the original team, Daniel is the only survivor after O'Neill, Carter and Teal'c are all killed in the first attempt at an uprising, while alternate!Daniel is killed by alternate!Teal'c after Apophis implants him with a Goa'uld spy. Then the alternate versions of O'Neill, Carter and Teal'c travel back to Ancient Egypt where they meet up with prime!Daniel, and after staging a successful uprising against Ra they all presumably die in the past, creating a third timeline where everything is pretty much as it should be, save for the aforementioned fish in O'Neill's pond.
- Does Not Like Guns: Alternate Carter claims that she doesn't really like guns; she prefers explosives.
- Dramatic Irony: Daniel comments on the irony of having to re-capture the Time Jumper from Ra's Jaffa in order to fix the timeline when the whole reason they got stuck in the past is due to Carter warning them not to intervene in the exact same situation.
- Eternal English: Justified as Katep only speaks English as a result of being exposed to SG-1. None of the other Egyptians are shown to speak it, and alternate Carter even points the unlikelihood of anyone understanding them to O'Neill when they first arrive.
- Fish out of Water: Alternate Carter and Daniel are hopelessly out of their depth on a military recon mission.
- For Want of a Nail: Further changes are introduced as a result of the altered timeline; most notably, Teal'c is still First Prime of Apophis, and for some reason Kawalsky joined the Marines rather than the Air Force. Also, Apophis and Kawalsky are both still alive.
- Friendly Address Privileges: Alternate O'Neill invites Carter to call him "Jack".
- Helmets Are Hardly Heroic: Lampshaded when alternate Daniel demands to know why O'Neill doesn't have to wear a helmet while he and Carter do. O'Neill just gives him a look in response.
- Hot Scientist: Alternate O'Neill comments on how strange it is to hear incomprehensible Techno Babble coming from somebody who looks like Carter.Alt!O'Neill: It's just a little weird hearing that kind of stuff come out of someone so...Alt!Carter: So what?Alt!O'Neill: Hot.
- In the Back: Kawalsky is killed by a staff blast to the back.
- La Résistance: It's revealed that the original team decided to join the uprising against Ra since they were stuck in the past anyway, and in fact may have been the inspiration behind it.
- Layman's Terms:Alt!Carter: If they penetrate the hull and hit the engines, the energy blast could feet back into the power banks—Alt!O'Neill: Carter!Alt!Carter: We could explode!
- Mistaken for Gay: When alternate Carter tells alternate O'Neill that she has a thing for Daniel, he makes a comment that seems to imply he had assumed Daniel to be gay.Alt!O'Neill: First impressions, I kinda thought he was... (makes vague hand gestures while Carter looks confused) ...Never mind.
- MookFace Turn: Alternate Teal'c quickly defects to the heroes after being shown the tape and learning about the success of the Jaffa rebellion in the prime timeline.
- Noodle Incident:Alt!Kawalsky: Seriously, why did we bring them?Alt!O'Neill: Oh, I don't know. I guess I had a gut feeling.Alt!Kawalsky: Like Peru?Alt!O'Neill: Alright, that didn't work out so well.
- Not Quite Dead: After Teal'c shoots alternate Daniel and claims he was a Goa'uld spy, the others stand around for several minutes arguing over how they can be sure and whether or not Teal'c can be trusted. Then Daniel abruptly sits up and starts shooting people until O'Neill and Kawalsky put him down for good.
- Now or Never Kiss: Between alternate O'Neill and alternate Carter when they're trapped in the Time Jumper and surrounded by Jaffa shooting at them. The neglect to come out right away once the threat has passed.
- A Rare Sentence: As the alternate team is preparing to go through the gate in the Time Jumper:Alt!Hammond: I'm allowing the use of this ship because of the obvious tactical advantage it provides you. Under no circumstances is it to be used to travel through time, understood? (beat) Never in my life would I have imagined giving that order.
- Rebel Leader: Prime!Daniel seems to have taken up this role in the uprising against Ra, as the Sole Survivor of the original team.
- Reckless Gun Usage: Lampshaded when alternate Daniel is given a crash course on how to use a gun and immediately holds it with the barrel pointing at O'Neill.Alt!O'Neill: Safety off, point and shoot... Not at me.
- Set Right What Once Went Wrong: The whole point of the episode is for the alternate team to fix the timeline, though O'Neill doesn't get fully on board with this plan until their actions on Chulak cause Apophis to send an armada to Earth.
- Semper Fi: It isn't commented on, but Kawalsky's jacket clearly states that he's a marine in this timeline.
- Ship Tease: The alternate O'Neill and Carter admit their attraction towards each other and kiss at the end of the episode.
- They Killed Kenny Again: Predictably, the alternate versions of both Daniel and Kawalsky are killed off with little fanfare.
- Torture Always Works: Averted; Apophis doesn't get anywhere trying to torture alternate Daniel for information, so he puts a snake in his head instead.
- Trust Password: Prime!Teal'c talks about Rya'c on the take in order to convince his alternate counterpart that it's real.
- What the Hell, Hero?: Alternate O'Neill gives Daniel a fair bit of grief for not mentioning on the tape that the Time Jumper comes with a cloaking device, as it would have saved them a lot of hassle on the mission to Chulak had they known ahead of time.
- Where It All Began: As this was intended to be the last episode of the series, it revisits both Ancient Egypt under Ra's rule and the prison on Chulak where the team where held in the pilot episode. This is made especially evident when the alternate team get to recruit Teal'c for a second time.
- Whole Plot Reference: To the pilot episode. O'Neill is recruited to lead a team through the Stargate by Samuels, he and Kawalsky have a little reunion conversation, they go to Chulak, manage to convince Teal'c to turn on the Goa'uld while trapped inside the palace prison cell, and during the escape, one of the team is revealed to have been taken over by a symbiote.