Other mistake: At the start, it's nighttime when the unsub hides in the house of the soon-to-be victim who goes to sleep when her alarm clock reads 'Tue 11:06', and then we see the time morph to 'Tue 1:13' when the victim is sound asleep, before the unsub comes out of the closet to kill her. However, the time on the clock should actually read 'Wed 1:13.'.
Audio problem: When Garcia is talking about the cross-examination she's done and how she should be praised for how quickly she'd done it, she crosses the room away from the computers (and the webcam she's shown through) to a bulletin board. While she's walking away, her voice gets fainter, and then becomes louder again when she returns, as though she were getting further and then closer again to a microphone. However, she is wearing a headset with a microphone - the volume wouldn't have changed.
Visible crew/equipment: After Prentiss and Morgan catch Eric and his girlfriend in the park it cuts to Prentiss and the girlfriend in the interrogation room, and as the camera tracks backward from the door's window we can see a nice reflection of the moving camera and also a crew member standing behind Hotchner.
Continuity mistake: When Rossi is in Zoe's bedroom the camera pans the room and we see the laptop on the desk with nothing on its lid, but in the closeup suddenly there's a large embroidered flower sticker on the laptop's lid, which vanishes again when Rossi lifts the lid.