Shockingly, Jo has no idea how to help Zoe with her advanced math and/or physics homework. Why did Zoe think she would? Jo pitifully asks if perhaps SARAH can't help her out, to which SARAH snottily replies that cheating isn't part of her programming. No, but robot murder and almost causing the west coast to be sucked into a giant black hole is, and everyone is cool with that. Why? Where are the repercussions? I don't want anything bad to happen to SARAH, but they could have at least said something about tweaking her programming last week! Zoe decides that she'd much rather participate in karaoke night at Café Diem than do her homework, but Jo is wise to Zoe's attempts to get one over on the baby-sitter and says there's no way Carter would approve of Zoe going out on a school night. Zoe says Lexi would let her go if she wasn't on some convenient excuse to not have her on this week that I FULLY SUPPORT, by the way. Jo says she's tired and has a headache, so she doesn't want to hear it from Zoe right now.

Back at GD, Carter decides that there's no way the floor could just disappear, even though the way it sank down into the ground looked perfectly reasonable to me. He puts his hand on the open space and, sure enough, there's solid ground where air should be. Carter figures it's just a hologram and confidently walks towards the button on the wall. He takes two steps and falls through space. Oh, shit. Carter's dead. I saw how far down the floor was -- fifty feet at least. There's no chance of survival. Tragic.

Jo walks into Café Diem, which is preparing for its first-ever karaoke night. First ever? Eureka has been in existence for this long with no karaoke? Tragic. She sits down next to Fargo while we get a welcome reappearance of Larry, who's just warming up with some scales. Fargo is too busy working on another AI program to pay much attention to karaoke, and he's surprised when Jo can quote Asimov's first law of robotics verbatim. I'm just surprised that the law says a robot cannot harm a human, and yet all of Fargo's AI creations have tried to do just that. So I guess it makes sense that he's having so much trouble with it right now. "Isaac Asimov is my personal god," Jo says, which should tell you straight away that something isn't right here. She says she loves sci-fi (or is that syfy? I just don't know anymore) and the videogame Halo 3, which I could totally see her being into. Doesn't it involve shooting stuff? But then Jo has no idea that Café Diem is holding a karaoke night even though Zoe just told her about it, so Jo still isn't herself. Fargo encourages Jo to stick around and participate, but before she can pick a song ("One Way Or Another" by Blondie, Jo! You won't regret it), Allison bursts in and wants to know why Jo isn't off investigating the thefts. "Must've slipped my mind for a second," Jo says. Allison doesn't like this at all and threatens to get someone else to do the job if Jo isn't feeling well. Jo quickly says she's fine and she's figured out who is responsible for the thefts: Larry, who just happens to be standing nearby.