This is in response to Williham Totland's answer above.
"Williham Totland" wrote:
Time travel in the Stargate universe is a bit strange, as it seems to be both
multiple-timeline and single-timeline at the same time, which doesn't make
even a tiny bit of sense.
I believe it is multi-time-line , but it's the character(s) who make the mistake (perhaps out of caution), like in the SG-1 episode, "1969"; it is quite likely that Hammond wasn't exactly an expert on anything temporal (then again, who is?), could just as well have assumed (no thanks to Hollywood) that if he hadn't sent SG-1 back again (from the original time-line since "Children of the Gods"), the he would be altering his own past, when in fact, his past has already happened, and the past he ended up sending SG-1 again to is not the same, but another (even if virtually identical) reality, meaning even if he hasn't sent them back in that episode, nothing would have happened.
The confusing factor in Moebius is that there seems to be three SG teams in
play, when there's really only one:
This is where I disagree. Again, lets keep in mind (assuming that I am correct) that time travel is just another way of crossing into an alternate reality . As such, I would submit that the following is what actually transpires:
1) SG-1 #1, departs in Jumper #1, from reality #1 (all the numbers correspond to the reality they are from.) End up going back some 5,000 years, in what is reality #2, where they get stuck after the clocked jumper (#1) is discovered by Ra's Jaffa.
2) Fast foward as reality #2 plays out all the way to present day, where we meet the indigenous SG-1 (#2), where Sam and Daniel have day jobs, Jack conducts fishing tours, and Teal is first prime. The former three get located by the air force after the tape and jumper (#1) are recovered. They proceed to use said jumper to go through the recovered arctic gate to Chulak and encounter reality #2 native Teal'c.
3) SG-1 #2 (minus Daniel #2) activates the "flux capacitor" activates the time travel device and travels once more roughly 5,000 years back, which inserts them into reality #3. There, SG-1 #2 encounters Daniel #4 .
4) This reality (#3) then plays out, where events mirror closely enough to the original time-line, reality #1 (Ra is successfully over-thrown and leaves the gate behind this time), up to where we get to present day again, where we have SG-1 #3, who are the indigenous SG-1 to this reality.
The problem is that the existence of this Time Jumper is a production error.
This episode makes everyones head hurt, including the writers, apparently.
"It's Good to be King" happens in the original timeline, to SG-1 #1
Why wouldn't it?
Jumper #1 (from reality #1) ended up in reality #3 when SG-1 #2 went back in time (when still on Chulak), and was presumably either destroyed or damaged (as it was unusable from all the blasts it took on both Chulak and later in ancient Egypt. Also, at the same time, in reality #3, there were potentially two Jumpers there; jumper #1 which traveled from reality #2 (when they were on Chulak) and the one that was found half-buried after a sand storm (jumper #4, see footnote ) by Ra's jaffa patrols.
After that, reality #3 plays out to modern day, in which there nothing that we were shown on screen that would suggest that "It's Good to be King" would not have still occurred in this resulting reality. Therefore, they still would have found the jumper (which would be jumper #3 ) when they went to that planet after having been summoned by "King Archon."
 The terms "parallel", "alternate", or "multiple", when used with "reality", "universe", or "time-line", are actually fully interchangeable when talking about a meta verse (what defines the traits of a show, movie, book, and/or production.) Think about it like this: Any alternate time-line IS an alternate reality or universe. SG1 #2 were just as much alternates versions of the SG1 we know as alternate Sam was in Point of View (SG-1, Season 3.)
The difference being in the method used to cross over; the Quantum Mirror appeared to only transfer the travelers to the same point in time in another reality, where as a "time machine" transfers the traveler to any arbitrary point into what is another reality (one of the many possible permutations for each an alternate universe is supposed exist for.
 Yes, "Daniel #4" is NOT Daniel #1 who time-traveled with his SG-1 (again, this is NOT SG-1 #1) from yet another alternate reality that is likely nearly identical to reality #1, but nonetheless is it's own separate reality (for one thing, reality #1 did not include a second SG-1, a la #2 around 3000 B.C., which is one thing that makes reality #3 distinct from reality #2, around that point of time.)
Why did I pick "#4" for that SG-1, you might ask? #4 is just an arbitrary number that I chose to show that he's not the same Daniel of reality #1, that we see at the beginning of "Moebius Part 1", who traveled along with the rest of SG-1 back in time ~5,000 years into reality #2.
 Note that jumper #2 was never recovered, since SG-1 #2 used jumper #1 which was recovered from Egypt when reality #2 played out to modern day. They never went to the planet in "It's Good to be King" in reality #2, since there wasn't a gate program. They had gone back in time with jumper #1 (the second time that jumper had been used to time travel by an instance of SG-1) emerging into reality #3, where it was probably destroyed or ravaged.