Visible crew/equipment: When Dr. DeRaad asks Kerry if she knows Paul Sobriki she tells him to check the board, and as Kerry walks past the door we can see the reflection of a crouched crew member walking backwards, pulling a rolling microphone stand. (00:02:45)
Visible crew/equipment: When Luka and Mark are questioning Amira about the knife Sobriki had used, Kerry walks in then tells Amira to go upstairs to get security to open the personnel office, and the green T-mark taped to the floor is visible near Luka's feet. (00:16:45)
Continuity mistake: While operating on Lucy, Kerry Weaver gets massive amounts of blood on her left sleeve, but when she is sent to the OR the sleeve barely has any blood on it.
Character mistake: This has happened a few times before on this show. At the beginning of the episode, they are having a very loud party in the ER. There is no possible way this could ever happen in a real hospital. Even during an extremely quiet period, which rarely happens at County General, it would be extremely rude and unprofessional for patients. There's no way Kerry would be OK with such activities.
Continuity mistake: This episode is an instant continuation of episode 13. At the beginning of the episode, Kerry is walking in and asks if Mark is still on. Carol says he left at 8 for a double date. However, in the last episode, Mark was already at a restaurant with Elizabeth and their parents when Abby pronounced a patient's T.O.D. As 19:19. (00:00:55)
Visible crew/equipment: When Chen and Malucci walk into Doc Magoo's, as the camera pans around to the others already there, the reflection of the moving boom pole and mic is visible on the wall/window. (00:30:20)
Revealing mistake: After Mark gives his father the keys and tells him to park the van, in a following shot when Elizabeth joins the gurney rush with Carter, as she's walking backwards there's a distinctive large bulge at the back of her waist from the mic transmitter. (00:10:55)
Answer: It was in "Chaos Theory", the first episode of season 9 (time code 00:13:55).
Super Grover ★