Isis, later. Dr. Hamilton is kneeling on the floor next to Clark in the Isis Command Center. He's examining Eva's body. Clark is annoyed that Chloe is still out there somewhere with Davis. He's mad he didn't see through Eva's disguise. [Especially since he couldn't see through Chloe's disguise a few weeks back. - Z] Hamilton, who is the only person on this show who consistently makes sense, says she was a shapeshifter. Shapeshiftah! "It was her job to fool you!" he advises. Yes! Makes total sense! Hamilton says she knew she'd catch Clark at his most vulnerable by posing as his best friend. He casts a fluorescent pink light on Eva's neck and she has the same symbols on it that Live Wire did. Clark says they've all been tagged. He was mad at Eva, but says she didn't deserve this. Clark thinks he knows who killed her. She and the others were working for Tess. Hamilton thinks Chloe might get caught in the crossfire if these kids are looking for Doomsday. Clark plans to go and stop Tess immediately. Hamilton says you don't corner rats, especially when they're this lethal. It only works if they are secretly gourmet cooks and you're looking for a good meal. He tosses Clark a sample he just drew; it's the same metallic explosive device that killed Live Wire. He thinks that if Clark confronts Tess, she could push a button and kill the rest of the team. Clark says they're also GPS devices that work on a frequency. He asks if Hamilton can isolate it. Hamilton thinks about it for half a second and says he could piggyback on the signal to find the others. Well, then, do it, man! Clark says that if he can find the team, he can find Chloe. Hamilton nods. Yes, Clark. Your brain is surprisingly spry today.