In Season 3,

  • Episode 8 "McKay and Mrs. Miller", the team completely drains Atlantis' only ZPM.

  • Episode 9 takes place off-world.

  • Episode 10 shows a fully functioning Atlantis (which is turned over the Lanteans).

The canon shows no ability to regenerate a depleted ZPM so that really leaves continuity error or number of much less likely reasons that Atlantis ends up with a fully functioning ZPM.

Where did their operational ZPM come from?

  • i cant remeber these episodes 100% but i thought the lanteans (well the replicators) bring new ZPMS. i know the replicators also have like unlimited zpms, as the steal them from them lol. – Himarm Apr 2 '15 at 13:31
  • Either that, or they aired out of order? – PiousVenom Apr 2 '15 at 13:33

It's not a continuity error: the Lanteans had a ZPM on their ship, and they used that to power Atlantis.

Early in the episode, McKay points out the problem when introducing the new Gate Bridge:

McKay: So, I’m in Atlantis and I need to get to Earth. What do I do? Since we no longer have access to a ZedP.M. -- due to unforeseeable circumstances -- my only option would be to call the Daedalus and spend the next three weeks twiddling my thumbs waiting to get back home.

Stargate: Atlantis Season 3 Episode 10: "The Return: Part 1"

Sheppard confirms that the evacuation (for want of a better word) is courtesy of a ZPM from the Lanteans (emphasis mine):

Sheppard: Well, we are way ahead of schedule, ready to head out at 0800. Daedalus is gonna take most of the gear. People and our odds and ends will make their way through the Stargate, thanks to the Ancients' new ZeeP.M.

Stargate: Atlantis Season 3 Episode 10: "The Return: Part 1"

As to how Atlantis is even running after the ZPM is depleted in "McKay and Mrs. Miller", it was established as far back as season 1 that they can power the city (to a limited degree), and even dial out within the Pegasus galaxy, using naquadah generators:

Beckett: What about our own power generators?

McKay: We're working on that, but even with our most advanced naqahdah power generators, the equations are coming up far short.


Sumner: Can we use the Stargate?

McKay: There's nowhere near enough power to open a wormhole back to Earth.

Sheppard: Maybe somewhere in this galaxy.

McKay: That's relatively easy.

Stargate: Atlantis Season 1 Episode 1: "Rising: Part 1"

  • Ah, OK either the Lanteans in the Aurora or the Replicators that kick their ass would have supplied one. Since the Replicators could have fully powered Atlantis with 3 ZPMs and the SGA team ends up with just one, I assume it is the Lanteans who provide the single replacement. Too bad they were exterminated. – Jim2B Apr 2 '15 at 13:40
  • Personally, I can't believe Sheppard or McKay didn't think of doing what Todd did - steal the Replicators' ZPMs before blowing the place. But... that was after this episode, so I digress. – Omegacron Apr 2 '15 at 14:58
  • IIRC the Lanteans supplied one ZPM that had been powering their ship before the Replicators arrived and took over. Then they were nice enough to repair primary systems and bring Atlantis up to 3 ZPM. After regaining control of the city they only got to keep one of the ZPM with Earth and one of the BC304s getting the other two to defend against the Ori. – John LA Aug 16 at 1:30

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.