After depositing Chance in a seat, the Air Marshal checks in with the flight attendants (Laura, Winston, and Unnamed Third Flight Attendant Who Has No Lines). His theory is that someone on the ground crew must have smuggled guns aboard. He tells Winston to watch Chance while he gets the other guy. Winston slips Chance a paperclip and tells him that the hacker's been located and the threat is out cold and about to be handcuffed. So things are going pretty well! Chance has bad news: the phone he grabbed from the bad guy reveals that there's another bad guy on the plane. It never ends!
Winston goes to bring Casper up so she can sit by Chance, when the lights go out and oxygen masks drop from the ceiling. Suddenly! And the air marshal is dragging unconscious pilots out of the cockpit! Chance appears and tells the marshal that the fire must be a frayed wire in the fuselage. He starts to go to the cockpit, but the marshal pulls his gun. He doesn't like the idea of Chance flying the plane at all. The next time the lights go out, Chance jumps the air marshal and they fight. The gun goes flying, and Laura grabs his gun. She wants to let Chance take charge, because he seems like a take-charge kind of guy. Winston fights the air marshal! Chance and Laura duck into the cockpit, and we're about at the spot where the episode began.
Except that this time, we see Laura exchange nods with the handcuffed bad guy, and as they enter the cockpit, we see a pistol stuck into the back of her waistband. So now we know that she's the second kidnapper, and the gun-toting goon Winston is fighting with is a good guy. Chance locks the cockpit door behind them, and now the spot where she says "stewardess" instead of "flight attendant" is more of a tell.
It's time for the plane to turn upside down. Winston tells all the passengers what to do, and they seem pretty receptive to the idea, so they line up against the left wall. Laura talks about how they're about to die, and now it's time to flip the plane. It goes pretty smoothly, and now the plane is flying upside down. The landing gear is open (whish is weird, because when they tried to open it, it didn't work) and the fire is soon out. But now Chance can't flip them back over, because the controls aren't responding! The flight computer has switched to autopilot (because that's obviously what you'd program it to do if the plane turns over) and now they're stuck being upside down. I can only assume they'll be upside down for the rest of their lives. Maybe they can move to Australia, where everyone's like that.