The Lost Tribe

"The Lost Tribe" is the eleventh episode of the fifth season of Stargate Atlantis.

Plot
The power spike in the Atlantis Gate caused by the Attero device has caused the gate to explode with the strength of 12 nuclear bombs. Zelenka Managed to raise Atlantis' shield around the gate seconds before the gate exploded but, according to Zelenka the shields would fail before the explosion completely dissipated. Sheppard and Zelenka managed to exit the control room just as the shields failed, destroying Stargate Operations.

Meanwhile, "Todd" the Wraith has seized control of the Earth battle cruiser Daedalus, Though he and his forces have subdued the ship's 200-person crew, Ronon and Keller still remain at large. They sabotage the ship's shields, weapons, and hyperdrive by blasting the control crystals in the engineering room. Todd accesses the ship-wide P.A. system and threatens to begin killing crew members unless they turn themselves in, as a result, Keller turns herself in to give Ronon time to rescue the crew. Soon, Todd has repaired the hyperdrive and continued his journey to the Attero device.

A Traveler ship arrives at Atlantis and the ships captain Katana asks the Atlantis Expedition why stargates are blowing up around the galaxy. The team Informs the captain about the Attero device and their stolen ship. Katana agrees to help them shut down the device. Col. Sheppard and Dr. Zelenka, board the ship and the ship travels for Janus' lab.

In the hopes of getting his ship's hyperdrive running at maximum output, Katana brings Zelenka and Sheppard into the aged and cluttered engineering room and introduces them to his chief engineer -- Mila, who is only 15 years old. Mila has been working with the hyperdrive engine since she was 4 years old, and is a brilliant young woman who will do whatever is necessary to get the job done. Where Radek is cautious and doubtful that the job can get done (safely, at any rate), Mila shows him otherwise.

After a brief interrogation by Todd Keller is escorted to the room where the rest of the Daedalus crew is being held. Before they can get there Ronon drops from the ceiling and kills the two wraith holding Keller. Ronon hands her a gun and they release the rest of the crew. Ronon tells them there is an armory down the hall and they should get as many people armed as possible. The crew quickly makes its way to the control room without encountering a single wraith.

The crew quickly finds out that they are locked out of the sub-light controls and the Daedalus is on a course to Janus' lab. A life sign scan reveals that all the wraith are aboard their ship in the 302 bay. The crew try to regain control but are unable.

On Janus' lab Daniel Jackson and Rodney McKay are discussing what effect the Attero device would have on active Stargates when one of their alien captors enters and demands that Jackson come with him. Jackson is lead into a room with another alien. He warns the aliens of the effect the device has on Stargates but the alien is unconcerned by the deaths of millions of humans. Jackson demands to know who the aliens are inside their suits. The back of the aliens suit opens and an Asgard steps out. Jackson informs them that the Tau'ri have encountered the Asgard before and were even allies with them. After Jackson informs him that all the Asgard in the Milky Way committed suicide because of genetic degradation from cloning the Asgard tells him that the Asgard in Pegasus are also clones but by continuing Loki's research on humans they are fixing the problem.

The Daedalus arrives above the planet to find the Traveler ship engaged in battle with The Asgard ships. Todds ship exits the 302 bay and disappears. When the Traveler ship defeats that Asgard, they make contact with the Daedalus and are surprised to find Woolsey and the Daedalus crew in control of the ship. They quickly discover that Todd has programed the Daedalus to impact with the Lab in order to destroy it and the Attero Device. The Traveler ship opens a hyperspace window in front of the Daedalus and both of them enter it moments before the Daedalus impacts the planet. The crew then regain control of the ship.

McKay and Jackson escape the room they are being held prisoner in and steal two suits from the Asgard. They use these suits and guns to take over the lab. When they attempt to shut down the device they find that the Asgard too the control device with them. They decide to use the suits to protect them from radiation and electricity to shut it down manually. Just as Mckay removes the control crystal an energy strike hits Jackson in the chest. As the two men are contemplating their deaths they are beamed aboard the Daedalus and Jackson is taken to the Med bay.

Back on Atlantis the team begins repairs on the city and the Daedalus. The Atlantis Expedition has salvaged one of the gates from the space bridge to use as their new gate. Jackson will be sent back to earth to recover from his injuries.

Notable Quotes
(door opens revealing two Asgard suits) McKay: (pleading) Oh my God, please don't kill me, you need me. Daniel: Rodney? McKay: Us, us. You need us. Look, the device needs constant care. I mean, true, I'm the only one who knows how to work it. You don't have to kill me for it, you're not a violent race. I mean, you may have stunned us a few more times than I would have liked, but who's to say we didn't deserve it. Daniel: Rodney, they're just suits- McKay: Yeah, suits. Suits that house one of the smartest races that ever evolved. The Asgards, I've always been a big fan of the Asgards. Some of my best friends are Asgards. Daniel: They're empty suits. (waves his hand in front of their helmets) See? McKay: (defeated) I know I was uh... Daniel: You were...? McKay: It's not important.

Sheppard: I just opened up a hyperspace window big enough for the both of us. We just travelled through the planet. Kevin Marks: (to Woolsey) I got it. I'm back in. We've got control of the ship. Woolsey: And not a moment...too late.

Background notes

 * We now know that Todd is at least 10000 years old, as he said he was there when the device was first activated after Janus had built it.
 * When the Daedalus' hyperdrive is repaired and Todd takes the Daedalus into hyperspace, it is the footage of the Daedalus entering hyperspace at the end of Midway, only sped up.

Production

 * Michael Shanks guest-starred as Daniel Jackson.
 * A video was leaked from Sci-Fi to Youtube that shows that the Aliens are in fact a renegade Asgard faction. Click this link for the video: