This episode has an alternate subtitle, the title card lists it as "The Screw Job".
At the top of the show, before game play, it is revealed that each of the characters have a secret they are keeping from everyone else and that they think they are the only one with a secret. Tarvis' secret: He's after a ledger, not a gem. Obby's secret: He has none, but doesn't know that. Liam just thought that would be funny. Delweth's secret: She loathe's Tarvis and intends to kill him before the night is through. Dren's secret: She has fallen in love with the prisoner, intends to turn on her team, kill them, and run away with the gem and Devan. Devan's secret: She's not in love with Dren. She is, in fact, playing her, and plans to kill her after the others are dead and run off with the gem herself to start a new life on her own.