Descent

Descent is the third episode of the sixth season of Stargate SG-1.

Plot
A Tel'tak with SG-1, Jacob Carter, Major Davis and Dr. Friesen on board flies to a Ha'tak which was detected near Earth. Jonas is very joyful since he has never been in space before. When they arrive at the ship (which Major Carter identifies as the one Anubis used to hold Thor captive) they detect that it is unmanned and all except Teal'c and Jonas beam on board. While they go to the Pel'tak they hear an unknown crackling sound. In the meantime Teal'c contacts General George Hammond.

On the Pel'tak they find out that the self-destruct was suspended, so Major Carter and Davis go to the computer core to completely stop it; however, the area is sealed off. Meanwhile, Col. O'Neill and Friesen look around when O'Neill is called to blow up the door to the computer core. Friesen then looks for the shield generator but he is suddenly confronted by three Jaffa.

On the Tel'tak Jonas talks with Teal'c about the rumour that he was only chosen so that a Russian wouldn't have to become a member of SG-1. However Teal'c tells him not to listen to things like this. Back on the Ha'tak, Carter suggests that Thor may be responsible for the situation of the ship. When they contact Friesen and he doesn't answer, O'Neill looks for him and finds him dead and warns the others. Jacob is then shot by the Jaffa, who program the ship to fall to Earth. The others then arrive on the Pel'tak and O'Neill calls Teal'c. Moments later, the three Jaffa beam on board and are quickly killed by Teal'c. However, they destroy the Ring Transporter, stranding SG-1 on the Ha'tak.

Back at Stargate Command, Teal'c and Jonas arrive and are informed by Hammond about the situation. The two aliens then join the rescue mission. On the way to the airport Jonas is angry about himself because he couldn't do anything but Teal'c again says it wasn't his fault.

On the submerged Ha'tak, Jacob talks with O'Neill about what has happened when Carter and Davis tell them that there is structural damage. Carter and O'Neill attempt to go to the computer core, but there is water coming in and suddenly the two are locked when the door behind them closes. Jacob can't open it and the water rises until he believes that they have drowned. Suddenly the door opens and they escape. Meanwhile, Jonas and Teal'c have arrived in the rescue submarine. They all meet on the Pel'tak and it turns out that the crackling is Thor's voice, leading them to believe that Thor downloaded his mind into the computer. SG-1 (without Jonas) is able to load his mind into a data storage device. On the way back, the door closes because the corridor is flooded, and as all the other corridors are already flooded, they seem to be stranded. Then, Carter and Teal'c come up with the idea to try to escape through the Death glider hangar.

While Jacob and Davis escape with the submarine, Jonas tries to activate the force field of the hangar. He is successful and then uses a Ring Transporter to beam to the rest of the team. They get into the gliders and fly out, shortly before the ship explodes. Then, they use the gliders to fly home and in the end, O'Neill tells Jacob that all members of SG-1 are "present and accounted for".

Notable Quotes
Teal'c: The crew appears to have abandoned ship General Hammond.

General Hammond: That's good news. I don't mind telling you that we've all been holding our breaths down here.

Teal'c: That is most unwise.

General Hammond: Yes, of course Teal'c.

Jack O'neill: Dr. Friesen says he want's a look at the sheild generators.

Jacob/Semlak: Did he say why?

Dr. Friesen: (after Jack looks at him) Why? To see them.

Jack O'neill: (to Dr. Friesen)To see them?... (to Jacob) Never mind.

Jack O'neill: I have to go blow something up.

Teal'c: O'neill would not of chosen you if he did not believe you would become an effect member of SG-1

Jonas Quinn: Why thank's Teal'c. I really appreaciate that. I mean, those of us who are not originally from the planet earth need to stick together.

Teal'c: Are you suggesting an alien conspiracy?

(as the room they are sealed in floods with sea water)

Jack O'neill: Next time we crash our brand new mothership, what do you say we do it in the tropics, huh?

Major Carter: Actually sir, It wouldn't make a difference, at this dept, all water is ice cold.

Jack O'neill: Shallower water then, shallower!

Major Carter: Yes sir, I'll keep that in mind.

Jack O'neill: Or, we could just not crash at all. I would be nice to keep our nice new mothership more than a couple of hours.

Major Carter: Thank you, sir.

(as they discuss whether to download Thor's consiousness from the computer)

Davis: I know Thor was a friend of yours, bu this is a Goa'uld mothership. If we let it blow up, there will be nothing left to salvage.

Jacob/Semlak: Jack, the ship is never going to fly again. I say having the Supreme Commander of the Asgard fleet owe you one is much more valuable.

Jack O'neill: Yeah. Alright, next mothership we keep.