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Lost City

07.21/22 Episode 153/154 (#P261)
Airdate: March 12 & 19, 2004

Ancient writings on P3X-439 speak of an Ancient repository which could be similar to the device found on P3R-272. Hammond authorizes a mission to extract the device and return it for study, hoping that it will hold the key to the Lost City and technology that could save Earth from Anubis. As SG-1 searches the ruins, the repository device materializes, but when Anubis's fleet launches an attack on the planet, SG-1 can't allow the vital information to be lost, nor to fall into the hands of Anubis. With no option remaining, O'Neill places his head in the device, and the Ancient knowledge is downloaded into his mind.

SG-1 hopes that the knowledge within O'Neill will reveal the location of the Lost City, but they know that unless a way is found to reverse the technology, the Ancient knowledge will overwrite O'Neill's brain and eventually kill him. Meanwhile, in Washington DC, Dr. Elizabeth Weir, an expert in international politics, meets with Vice President Kinsey and learns of the Stargate Program. She is even more astounded, however, when President Hayes, recognizing the political need to shift from military to civilian control of the SGC, relieves General Hammond of command, and offers command of the Stargate Program to her.

As Dr. Weir attempts to come to terms with the immense task of running the SGC, Bra'tac arrives through the stargate bringing ominous news. Anubis is gathering the full force of his fleet and will arrive in three days. Weir meets with SG-1 and Bra'tac, as well as Kinsey, who scoffs at Bra'tac's warning. Kinsey threatens that Weir mustn't cross him, but Weir refuses to be a puppet to his agenda. She recognizes O'Neill's sacrifice, and agrees to allow O'Neill and SG-1 the time to draw on the Ancient knowledge in O'Neill's mind that could be the last chance to save the planet.

As the knowledge of the Ancients that could save Earth begins slowly rewriting Colonel O'Neill's brain, random words from O'Neill provide a clue. Praclarush Taonas may be the Lost City they seek, but when SG-1 journeys to the distant planet, they find a world lost in fire beneath lava flows. However, a preserved subterranean chamber holds a unique power source and a throne-like chair which O'Neill activates to create a holographic map that leads back to Earth. The key to the Lost City, "Terra Atlantus," lies beneath the ice of Antarctica.

Anubis's fleet has arrived in Earth's orbit and has begun testing the planet's defenses. President Hayes meets with his advisors in the Oval Office, but without the Ancient technology, Earth is defenseless. As SG-1 returns from Taonas with the power source retrieved from the planet, O'Neill's condition grows more advanced. He possesses both the knowledge and the healing power of the Ancients, but has lost the ability to communicate. Kinsey attempts to relieve Dr. Weir of command, but the President dismisses him and supports Weir's recommendation to defend SG-1's ship at all costs. He launches Prometheus, with Hammond at the helm.

As Prometheus and a fleet of F-302s engage Anubis's fleet in a mammoth battle above Antarctica, SG-1 rings down to a familiar chamber beneath the ice. With the new power source, O'Neill activates an identical chair, and summons the power of the Ancients. The ground opens, and a stream of thousands of flying glowing energy drones swarms to the surface and annihilates the enemy fleet. Earth has been saved, but O'Neill is near death. A cryogenic chamber encases him, but the small outpost provides no answers. O'Neill and the Ancient knowledge he possesses are lost, held in suspended animation beneath the Antarctic ice. This episode aired in two parts.

Written by: Brad Wright and Robert C. Cooper
Directed by: Martin Wood

Guest Starring: William Devane as President Henry Hayes, Jessica Steen as Dr. Elizabeth Weir, Tony Amendola as Bra'tac, James McDaniel as General Francis Maynard, Marc Worden as Ronan, David Palffy as Anubis, Michael Adamthwaite as Herak, Ingrid Kavelaars as Major Gant, Gary Jones as Technician, Ronny Cox as Vice President Robert Kinsey, Eric Breker as Colonel Reynolds, Jason Howell as Major Harper, General John P. Jumper, US Air Force Chief of Staff as Himself, John Prowse as Colonel Pearson, Kurt Max Runte as Colonel Kirkland, Jerr Weddell as Jaffa Commander, Igor Morozov as Russian Man, Mark Pawson as Secret Service Man, Dee Jay Jackson as Cab Driver, Ron Blecker as SG-3 Airman, Peter Kufluk as Technician, Colleen Winton as National Security Advisor, Dan Payne as Kull Warrior, Holly Dignard as President's Aide, Bonnie Arbuthnot as Bonnie

Reference: Alkesh, Ancients, Ancient Defense Weapon, Ancient Gene, Ancient Language, Ancient Outpost, Ancient Repository, Ancient Stasis Chamber, Antarctica, Anubis, Atlantis, BC-303, Bonnie, Bra'tac, Chulak, Crystals, Death Glider, DEFCON, Disclosure, Energy Weapon, F-302, Force Field, Erin Gant, George Hammond, Major Harper, Ha'tak, Henry Hayes, Hazmat, Herak, Holographic Projection, John P. Jumper, Robert Kinsey, Colonel Kirkland, Kull Warrior, Lost City, Francis Maynard, Naquadah Generator, Jack O'Neill, P3X-439, Colonel Pearson, Praclarush Taonas, Prometheus, Colonel Reynolds, Ring Transporter, Ronan, System Lords, Teltac, UTD, Elizabeth Weir, Major Wood, Zat'nik'tel, Zero Point Module


Destinations & Inhabitants


Destinations & Inhabitants

Ancient Repository

Destinations & Inhabitants

Praclarush Taonas

Destinations & Inhabitants

Ancient Defense Platform

Destinations & Inhabitants

Antarctic Outpost


  • President Hayes effectively shut down the SGC for a three-month review process during which a newly formed government department will take the place of Stargate Command. Hammond is relieved of command and replaced by Dr. Elizabeth Weir, a civilian and expert in international politics.
  • Dr. Elizabeth Weir started her career as a political activist lobbying against the government's spending on the military. She speaks five languages, including Russian. She mediated a negotiation in North Africa, and brokered a dozen of the most sensitive international treaties in modern times, including several for the UN.
  • Hammond and President Hayes have known each other for a long time. Both were lieutenants when they last spoke.
  • Kinsey brought in a lot of financing to Hayes's campaign, and delivered Florida in the election.
  • SG-2 discovered a colonnade on P3X-439 with Ancient writing. SG-3 (commanded by Colonel Reynolds) and SG-5 (commanded by Major Harper) provide backup for SG-1 when they return to the planet.
  • "Up, down, charmed, strange" is a reference to different types of quarks.
  • Each symbol on the stargate has a corresponding sound so it can be spoken aloud, like an alphabet. Praclarush Taonas isn't just the name of the planet, it's also the gate address:
    • pra = 35, cla = 3, rush = 31, ta = 29, o = 5, nas = 17, at = Earth's point of origin
  • "Praclarush Taonas" means "lost in fire." The SGC had dialed the planet two years ago but couldn't establish a wormhole because the gate was buried under lava flows.
  • It is possible to use the coordinates of a gate address to calculate a planet's position in space in order to reach it by ship.
  • As O'Neill's mind is overwritten by the knowledge of the Ancients, he begins speaking Ancient words, recognizes the gate symbols as spoken sounds, begins packing without knowing why, adjusts the hyperdrive crystals to increase the speed of the cargo ship, controls the Ancient chair on Praclarush Taonas, heals Bra'tac's knife wound, modifies the transport rings, and activates the Ancient defense chair in Antarctica to destroy Anubis's fleet.
  • O'Neill begins speaking the language of the Ancients:
    • That's derentis. = "insane, crazy"
    • Things just popped into my fron. = "head"
    • A bit cruvis. = "wrong"
    • A little fron-ache. = "headache"
    • Terre Atlantus = "Earth, Atlantis"
    • Subo glaciuse = "under the ice"
    • Dormata = "sleep"
    • Aveo amacuse = "goodbye"
  • The transport rings have a limit to the thickness of solid matter they can penetrate. The transmission beam cannot penetrate a mile of solid ice.
  • President Hayes shares information about Anubis's impending attack with the governments of Russia, Great Britain, France, China, and Canada.
  • President Hayes informs Kinsey that he should consider his resignation accepted.
  • The SGC goes from DEFCON 3 to DEFCON 1.
  • The Ancient defense chair, the zero point module crystal power source, and the glowing defense drones do not yet have official names.
  • General John P. Jumper is the Chief of Staff of the US Air Force and a member of the Joint Chiefs of Staff in Washington, DC.
  • Coordinates for Praclarush Taonas: 35-3-31-29-5-17


  • Up, down, charmed, blank... [O'Neill]
    Strange. [Daniel]
    Yeah. Well, thanks anyway. [O'Neill]
    No, the word you're looking for is strange... [Daniel]
  • Okay, 23 across, the atomic weight of boron. The answer is 10. You wrote the word "fat". [Carter]
  • We could have Goa'uld on our collective asses any minute now. [O'Neill]
  • Inside, you say? Well, let me tell you, my friend... There is no inside. There's just a whole lot of outside. [O'Neill]
  • And who does the translating when you go Ancient?! [O'Neill]
  • Oh, please. Teal'c's, like, one of the deepest people I know. He's so deep. Go on, tell him how deep you are. You'll be lucky if you understand this. [Daniel]
    My depth is immaterial to this conversation. [Teal'c]
    Oh! You see? [Daniel]
    No more beer for you. [O'Neill]
  • All right, that does it! You know, the entire VHS collection was going to one of you. It's going to Siler. He gets it. [O'Neill]
  • I hope you like Guinness, sir. I find it a refreshing substitute for... food. [O'Neill]
  • That was a lot of hair ago, sir. [Hammond]
  • Sphere. Planet. Label. Name. [Daniel]
    Following! Still! You! Not! [O'Neill]
  • The clue for seven down is "celestial body," and he wrote "Uma Thurman." [Carter]
  • At. [O'Neill]
    What? [Carter]
    At. [O'Neill]
    This? [Daniel]
    That. [O'Neill]
    That is "at"? [Daniel]
    You can stop... that. [O'Neill]
  • Have you got everything you need? I think there's still a sink in the kitchen. [Weir]
    Is that a joke? [O'Neill]
    Perhaps... A bad one. [Weir]
    Yes, very bad. But I sense hope for you. [O'Neill]


  • For crying out loud: 1
  • O'Neill calls Teal'c "T": 1
  • Carter calls O'Neill "Jack": 1
  • Martin Wood cameo: airmen correcting O'Neill's crossword in the elevator
  • Injuries:
    • O'Neill: Ancient repository downloaded into his brain, succumbs to the knowledge of the Ancients, and is placed in suspended animation
  • Popular Culture References:
    • Monty Python-esque
      • Meet my maker? Pay the piper? Breach the pearly gates? Start pushing up daisies here and there?
    • The Music Man
      • And a few days after that it's good night, my someone, good night.
    • The Simpsons
      • Exxxcellent.
      • It's the perfect analogy... Burns as Goa'uld.