Visible crew/equipment: When they wheel Dianne (the OD) into the ER it's one long continuous shot from receiving to treatment 1, shot from the POV of the patient lying on the stretcher. As she's wheeled into treatment 1, the camera faces Johnny so we can see up the hallway behind him, and the entire admitting desk and waiting area are all blacked out, and there are two men, one of which (possibly the director) is sitting on a chair facing up the hallway where Johnny is and the scene is taking place.
Other mistake: Brackett has Johnny and Roy in his office to listen to recordings on two cassette tapes - the first of 51's transmission with Rampart, and the second of 49's transmission with Pediatric Clinic. Brackett plays the first tape, pops it out and then plays the second tape. The problem is that when Brackett puts the first cassette tape back in the player, it's been rewound, even though Brackett never actually rewound the tape.
Visible crew/equipment: When Roy and Johnny are dispatched to the plant with an 18 yr old whose arm is caught in a machine, the outlines of the mic transmitters are visible on the left side of Johnny's shirt, when he's on the Biophone, and on the left side of Roy's shirt, when he's putting the tourniquet on the 18 yr old.