Moebius, Part 2

"Moebius, Part 2" is the twentieth episode of the eighth season of Stargate SG-1.

Synopsis
After discovering a second Stargate in Antarctica, the team is sent to Chulak, to get to Teal'c and go to Egypt for the Zero Point Module. However, in the process the team are captured, and Teal'c is once again the First Prime of Apophis.

Plot
The scientists working on the recovered Puddle Jumper cannot make it work because they don't have the ATA gene. Colonel Jack O'Neill is called in to operate the Jumper and lead the team through the Beta Gate to find Teal'c, and agrees that Dr. Daniel Jackson and Dr. Samantha Carter are to join the team through the Stargate.

On Chulak, SG-1 are caught by Jaffa loyal to Apophis and imprisoned. Teal'c defects to their cause and helps them escape but Daniel is infected by a Goa'uld and killed by Teal'c. They escape in the Puddle Jumper, but are chased and damaged by Death Gliders. Unaware of the jumper's cloaking capacity, they believe that only way they can survive is to time-travel. They travel back to 3000 B.C. and use the Stargate to pass from Chulak to Ancient Egypt where the original versions of SG-1 were stranded and where Ra is still alive and ruling.

The original SG-1 attempted the rebellion because O'Neill and Teal'c didn't want to stay and O'Neill, Carter and Teal'c were killed when it failed. Dr. Daniel Jackson, the only survivor, meets with Carter, O'Neill and Teal'c. He has not yet made the tablet detailing the second successful rebellion attempt because it hasn't happened yet. This means that his current plans with the underground of the local populace are destined to succeed, however they lead to the Stargate being removed from Earth by Ra. The plan is to instigate the rebellion, thus diverting Ra's attention, and secure the Stargate to where it was original buried, allowing the original timeline to evolve as it did.

The rebellion ultimately succeeds, but not before Carter and O'Neill consummate their feelings for each other while under fire, uncertain if they will survive. Ra's Jaffa surrender, outnumbered by the staff weapon- and Zat'nik'tel-armed Egyptians. When Jack and Sam are told to come out by Daniel, Jack says "In a minute." and they kiss and fall out of frame. The alternate SG-1 bury the videotape, along with the Zero Point Module, for the SG-1 of the future to find. The Alternate-SG-1 and Daniel from the original SG-1 (of 3000 BC) live out the rest of their lives in Ancient Egypt.

The original SG-1 of the present day receive the videotape and the ZPM left for them a few weeks before they were to go back in time. As the timeline has been restored, they have no reason to go back in time, and they've gained a ZPM free of charge. The episode ends with SG-1 at O'Neill's cabin, fishing, in a scene identical to the end of "Threads", except there are now fish in Jack's pond.

Realizing they are now living in an alternate timeline in which an Alternate-SG-1 lived out their lives circa 3,000 B.C., Jack O'Neill comments, as to the presence of fish in the pond (having been told there were supposed to be none by the Alternate-O'Neill speaking on the canopic jar videotape), "Close enough".

Alternate Timeline notes
Within the alternate timeline featured within the episode there are numerous differences from the original Stargate timeline, the roots traced to Ra taking the Giza Stargate with him when he fled the Earth. Differences from the original timeline include:
 * Jack is a charter boat captain, never rejoining the Air Force after his original resignation.
 * Jack speaks in a Minnesotan accent.
 * Daniel makes a living teaching English as a second language, having lost all standing within the archaeological community.
 * Carter never joined the Air Force and works as a civilian aerospace engineer.
 * Carter is seen practicing the "reproductive organs" speech (first heard in "Children of the Gods") in front of a mirror, but does not have the nerve to actually say it to anyone.
 * Carter is wearing glasses.
 * Robert Kinsey is President of the United States, while Henry Hayes is.
 * General Hammond is only a Brigadier (&quot;1 star&quot;) General, not a Lieutenant (&quot;3 star&quot;) General.
 * Cheyenne Mountain does not house Stargate Command. Rather, the USAF Advanced Research Institute, which can be briefly seen on the shoulder patch of one of the guards, is in charge of the program.
 * McKay does not have a citrus allergy, saying lemon chicken is his favorite food.
 * Major Davis has a moustache.
 * Major Kawalsky is in the US Marines and not the Air Force

In other languages

 * French: Retour vers le Futur (2ème partie) (Back to the Future (part 2))
 * Italian: Moebius (Parte 2) (Moebius (part 2))
 * Spanish: Moebius (Parte 2) (Moebius (part 2))
 * Czech: Moebius (část 2.) (Moebius (part 2))
 * German: Moebius, Teil 2 (Moebius, Part 2)