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 the son of the accident victims is being led through the trauma rooms to see his parents' bodies, you can see Laura Innes crouching under a table in the background directing the scene. Innes was the director of this episode and it was established that this episode took place on her character's day off. Therefore, she should not have appeared in front of the camera at all. (00:32:30)
Visible crew/equipment: At the very start, the camera tracks past the ambulance entrance towards admitting, and when the camera turns as Rolando asks, "What's your ETA?" the reflection of the camera operator is visible on the glass. (00:00:20)
24 Hours (1) (a.k.a. The Longest Day (1)) - S1-E1
Visible crew/equipment: When Hathaway tells Ross and Greene there are no more patients, the two doctors are standing in the corridor, and you can see their tape marks on the floor for where they need to stand. (00:11:15)
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: When young Robbie stands at the doorway of the trauma room with his father's body, the green door to the back supply cabinet is wide open and the floor is relatively clean, but when Robbie stands beside his father there are changes such as that cabinet door is closed, and the floor is littered with used latex gloves, etc. Then the cabinet door is wide open again when Carol and Luka walk in. (00:31:45)
Visible crew/equipment: When Mark and Doug are talking about Jen, Doug says, "If you can't make a marriage work, how the hell am I gonna," and just as Mark joins Susan at the desk, the reflection of the moving boom pole/mic is visible on the glass behind Mark. (00:22:15)
Visible crew/equipment: Dr. Kayson gets on the elevator, and Susan tries to get his evaluation about her patient with the mitral valve prolapse. Then, when Susan walks away from the elevator, as the rolling camera tracks to the right, its reflection is visible on the glass.
Visible crew/equipment: When Doug exits the taxi in front of the restaurant-bar, he walks toward the door, and the reflections of the Steadicam operator and another crew member beside him become visible on the glass near the door. (00:35:20)
Visible crew/equipment: The second time Carter stands ready in the OR, Nurse Shirley draws a circle on the floor around Carter's feet, then tells him, "Don't move!" While Morgenstern and Benton continue their round of foreign capitals during the surgery, just as Carter adds, "Kinshasa," the boom mic pops up into view at the bottom of the screen. (00:38:50)
Visible crew/equipment: Right at the start, Hathaway wakes Ross and Carter from their naps, and as she says, "Carter, med students don't sleep at 4:00 in the afternoon," there's a visible boom pole/mic at the top left side of the screen, that gets pulled up out of sight when the lights turn on.
Visible crew/equipment: After Jerry shows Mark how to use the paging microphone at the admit desk, the camera dollies out just as everyone joins Mark for Carter's prank, and there's a director's chair, with a crew member (has a goatee/beard) standing behind it, that is visible at the left side of the screen.
Going Home - S1-E4
Visible crew/equipment: Carol stands at the admitting doors and quips, "Excuse me, I'm here to unload that new shipment of barbiturates." It then cuts to Jerry and Susan just as they see Carol, and there's a director's chair, with "Script" on its back (for script coordinator), visible at the right side of the screen.





Answer: It was in "Chaos Theory" which is the first episode of season 9 (time code 00:13:55).
Super Grover ★