Revealing mistake: A recycled shot from an earlier episode causes Bob to enter the room wearing one costume and then suddenly be wearing another when he turns to begin his scene with Dresden and co. (00:11:50)
Visible crew/equipment: When Ned walks upstairs to check on the lady before the bad guy gets killed, behind him is a circular window. A reflecting light can be seen in the window along with what looks to be a boom microphone.
Character mistake: The registration number of Alan Salt's car is HUA222B, but when Rachel is on the phone asking an officer to look up the car's registered owner she gives the registration number as B222HUA.