Back at Castle, General Redhead congratulates Team Bartowski for their great work, but says Sarah is right: There's a traitor in the Cats. Sarah's sure it's Zondra, but Casey's always thought Carina was shifty. Chuck thinks it has to be Amy, because no one's really that perky. General Redhead wants the Cats to stay there at Castle, and she wants Casey to interrogate Gaez for the information on the mole. When she shuts herself off, Sarah tells Chuck she has a job for him. She leads him down the hall.
Upstairs at the Buy More, five minutes to closing time, Alex shows up to see Morgan and is happy and ready to go on a date with him until she notices the lipstick on his collar. Uh-oh. This is going to be a tough one to lie his way out of, even for Morgan. He tries to say that Carina obviously did this to sabotage his date with Alex, but Alex has seen enough. She really wants to believe Morgan, but thinks that it's asking too much for him to have canceled on her three times in a row. He reminds her that she trusts him, but she just replies, "Do I?" And then she leaves.
Chuck presents Sarah with his research into the Milan incident. He says it's not totally conclusive, but if they can figure out who was in Milan... Sarah cuts him off and asks him to stop helping with everything. She uses her secret hand coder to go into Castle and bring down a metal door, leaving Chuck on the outside. Zondra's in Castle, ready to greet Sarah. She thinks it's about time they settle this like real women: in a fight. They kick and battle it out as Casey and Amy head in to question Gaez. Casey says Amy's the "muscle," and she punches him in the face. Sarah and Zondra continue their cage match, both looking awfully hot. Gaez tells Casey he's never heard of the Gentle Hand, and he's just a businessman. Amy applies makeup throughout this, as Sarah and Zondra keep fighting. They get to a stalemate and discuss Milan: Neither of them was there. Turns out, though, that the makeup Amy's putting on isn't makeup. She was just pretending so she could blow powder in Casey's face. Which is exactly when Sarah and Zondra figure out the bad guy is Amy. That's also when Amy shows up and knocks out Zondra. She asks Sarah to join her, and then threatens Sarah, Chuck, and Ellie when Sarah says no. Then she knocks Sarah in the face and fade to black for a commercial break.