Moros would go on to play a big part in human history on Earth. Moros is mentioned in Greek legend as the personification of impending doom and destruction. After his ascension, he began to fear that the Ori posed a threat to him and the other ascended beings in the Milky Way. He decided to retake Human-form on Earth and build a weapon to destroy the Ori (The Sangraal). During this time he lived in England and was referred to Myrddin or Merlin. He entrusted his secret to a small number of noblemen on Earth, among them King Arthur.
In the Stargate SG-1 episode "Avalon (1)" Dr. Daniel Jackson is searching through a list of the Ancients that evacuated to Earth during the first Siege of Atlantis. The list includes the following Adalyx, Brallymynn, Cynrrid, Didthura, Dosa, Frodren, Glendolph, Laphrotia, Llewcygad, Llyggabrd, Lutthan, Minawara, Myrddin, Selmonkiv, Sigrid, Smylkamen, Srenala, Tristac, Tsiggnayl, Vortensis, and Wendamin.
McKay: We cannot let this chance to talk to a living, breathing Ancient slip through our fingers. Again. (glares at Sheppard)
McKay is referring to the encounter with an ascended being, Chaya/Athar, in the previous episode, "Sanctuary."
McKay: M7G-677, We've been to this planet.
M7G-677 is the planet inhabited by children in the episode "Childhood's End."
Based on estimates of the ages of the two Weirs, approximately 160-165 years of real time must pass to age a person in stasis one year. Approximately 13-14 years would age her a month and approximately 5-6 months would age her a day.
In the Season 10 Stargate SG-1 episode "The Pegasus Project", the leader of the Lantean council, Moros, was revealed to have been the mythological figure Merlin, who figured into later storylines on SG-1.
Alternate Timelines seem to be very confusing in Stargate. In the original Earth timeline, McKay was part of the Atlantis team, but he died trying to rescue people. When Wier went to the past, she set in motion a chain of events that allowed McKay to survive, but in that timeline, SG-1 traveled back in time to get a ZPM ("Moebius") effectively changing the timeline to one where the program was never started and McKay was just a regular scientist. Only when alternate SG-1 returns to fix things, can time progress as it was supposed to.
One Ancient council member (Melia McClure) was the same Ancient that appeared in the holographic message that was played by Dr. Beckett after the expedition first arrived in Atlantis in "Rising (1)".
Janus was named for Janus, the two-faced Roman god that represented time. In the Stargate SG-1 episode "It's Good To Be King", SG-1 finds a time traveling Puddle Jumper, presumably constructed by Janus after the Ancients evacuated Atlantis.
The city only rose from the water when they arrived from Earth due to a failsafe mechanism that Weir helped institute.
Goof: The Ancients Weir met thought she had left through the gate ahead of them. However, when they left, they did not shut down the city, nor did they put drop cloths over the computers. But, as was seen at the first arrival of Weir and the team, the city was shut down until they arrived and the drop cloths were over the computers. If they left the power on and drop cloths off when they thought she was gone, surely they would have done the same the first time they left, before she traveled back to save herself and the team the second time they arrived. The city must have been set to automatically shut down after everyone left, but it sensed that Weir was still there so it remained on the second time around.
(hearing Sheppard also died the first time)
McKay: Ha! Ah, the bitter taste of ultimate failure, hmm?
Sheppard: Well, if you had just figured out how to fix the damn shield in the first place none of us would've died.
McKay: I did everything I could, including valiantly attempting to save your sorry--
Weir: Gentlemen. Focus.
Weir: We hardly get a couple of words out of her before she dozes off.
Beckett: Which, I might remind you, is not uncommon for a woman of 10,000.
McKay: Let's not be too quick to exclude the possibility that the woman might be, um... What is the clinical term? "Nuts?"
Old Weir: Oh, look at you! Always worrying. You put too much pressure on yourself. Remember that miserable Baltic negotiation? What Simon told us afterwards?
Weir: "Breathe" among other things!
Zelenka: Who is shooting at us?
Sheppard: A better question is, how do we shoot back?
Sheppard: Your own mortality staring you right in the face. I can't imagine how you must be feeling.
Weir: When she looks at me, it's as if she's sensing my thoughts, and I'm sensing hers. It's very unsettling.
Sheppard: Just when you thought this place couldn't get any weirder!
Old Weir: Despite your efforts, there was nothing you could do, Rodney. Within seconds the Control Room was flooded.
McKay: I died?!
Old Weir: You never gave up trying, right until the end.
McKay: Well, a man wonders how he would choose to go out, given such dire circumstances. Now I know.
Old Weir: Trying to save the lives of others.
Sheppard: But ultimately failing!
Weir: It's airtight, I assume?
Sheppard: It's a spaceship; it'd better be.
Weir(Looking at her older self): Very. Very, very weird. Looking at yourself, how you will be.
McKay: Actually, how you will be will be different than how she is right now. You see, the moment she went back in time, she created a separate reality, a second "you" living in a parallel world; well, according to one of many interpretations of quantum theory. I mean, simply put, this interpretation states that, uh, the universe is in fact split into an infinite number of copies of itself in which every possible outcome to every decision ever made all exist somewhere in this infinitely layered multi-universe.
Weir: Simply put.
McKay: Yeah… In a nutshell.
McKay: Yeah, that's what I was afraid of. Freezer burn.
Ford: I thought she wasn't frozen?
Beckett: Ten thousand years… Do you expect her to dance a bloody jig?
Teyla: Is it possible the Atlanteans left her behind when they abandoned the city for Earth?
Sheppard: Maybe she wanted to stay behind.
Ford: Maybe they forgot about her.
Sheppard: In which case she's gonna be really pissed when she wakes up.
Sheppard: I picked this up on the mainland. The Athosians made it. Happy birthday.
Weir: Hmm. (unwraps pot) It's beautiful. How did you find out?
Sheppard: Mum's the word.
Old Weir: Don't worry, Carson. I am as freaked out about all this as you are!
McKay: What? What is it?
Teyla: Some sort of laboratory.
McKay: (on radio) We've come across dozens of them. The city's full of them. Something unusual about it?
Sheppard: (sees woman in stasis) I'd have to say... Yes.
Woman: It worked.
McKay: What was that?
Weir: She said, "It worked."
McKay: What's that mean?
Sheppard: I assume something worked.
McKay: Yes, that's very sharp!
Sheppard: Thank you!
Ford: Is time travel even possible?
McKay: Well, according to Einstein's general theory of relativity, there's nothing in the laws of physics to prevent it. Extremely difficult to achieve, mind you. You need the technology to manipulate black holes to create wormholes not only though points in space, but time.
Sheppard: Not to mention a really nice DeLorean.
McKay: Don't even get me started on that movie!
Sheppard: I liked that movie!
Sheppard: She doesn't look a thing over 9,000.
Sheppard: All right, we're done with the living quarters. We're moving on.
McKay: Whoa, whoa, whoa, before you go, did you see anything better than our current quarters?
Sheppard: A few. Some of them are pretty nice, actually.
McKay: Well, what kind of square footage are we talking about?
Sheppard: What am I, your realtor, Rodney? We're here to unlock the secrets of Atlantis.
McKay: Yeah, well, I'm looking for a one-bedroom with a den. Preferably with a balcony, but I'm not married to it.
-This episode was nominated for a Gemini Award for Best Achievement in Make-Up.
-This episode aired in Canada on December 6, 2004 on The Movie Network and Movie Central.
-This episode aired in the UK on January 25, 2005 on Sky One.
-This episode aired in Australia on July 14, 2005 on Channel 7.
-Syndication Premiere: February 19-20, 2005.
The title of this episode is based upon two lines from the Robert Frost poem Stopping By Woods On A Snowy Evening.
Sheppard: Not to mention a really nice DeLorean.
McKay: Well, it's obvious. The Puddle Jumper they escaped in must have been some sort of a time machine; had to have an additional component built into it.
Sheppard: Flux capacitor!
These are references to the Back to the Future trilogy of movies.