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)
24 Hours (2) (a.k.a. The Longest Day (2)) - S1-E2
Visible crew/equipment: When Dr. Greene goes into the lab with Mrs. Raskin, the boom mic is reflected in the glass behind them.
24 Hours (2) (a.k.a. The Longest Day (2)) - S1-E2
Visible crew/equipment: After Peter examines the man with a ruptured aortic aneurysm, he exits the room. Peter tells Susan that this man needs immediate surgery, and in the shots facing the exam room during their conversation, we can see the reflection of the moving boom mic on the door's glass, at the top of the screen.
Visible crew/equipment: Carter is told about the multiple rectal exams due to food poisoning. It then cuts to admitting, and just as the person at the desk bends over, on the glass partition we can see the reflection of the boom operator (wearing a white T-shirt) holding up the boom pole (not the maintenance worker standing on the ladder).
Going Home - S1-E4
Visible crew/equipment: While Doug and Carol are talking outside, Carol says, "You think you had something to do with my swallowing a whole bunch of pills," and just as Carol continues, "Well, you didn't," in this shot facing Doug, the boom mic dips into view at the top of the screen.
Going Home - S1-E4
Visible crew/equipment: After Lydia tells Carol that she's there if Carol ever wants to talk about it, just as Lydia hugs Carol, the reflection of the boom mic swoops into view on the partition, at the top right corner 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.
Hit and Run - S1-E5
Visible crew/equipment: After Malik brings in the bolt-cutters for the handcuffs on Mark's patient, it then cuts to Peter examining Susan's patient, and we can see the boom mic's moving reflection on the glass window.
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.
Chicago Heat - S1-E7
Visible crew/equipment: After Dr. Benton talks to the police detective and then goes to see the grocery store owner, as Dr. Benton swings open the doors, the camera crew can be seen in the reflection of the glass of the door.
9 1/2 Hours (a.k.a. Growing Up) - S1-E9
Visible crew/equipment: Susan leaves Mr. Randall on the elevator and tells him to call a cab so he can go home. When it cuts to Walt working on a car just as Peter shows up, the boom mic pops up into view and proceeds to bob around at the bottom right side of the screen.
9 1/2 Hours (a.k.a. Growing Up) - S1-E9
Visible crew/equipment: While Peter, Susan, and others start working on the high school wrestler, when a nurse says, "Glucose normal," and also in following shots, the reflection of the moving boom mic is visible on the door's glass, toward the top left side of the screen.
9 1/2 Hours (a.k.a. Growing Up) - S1-E9
Visible crew/equipment: After Susan asks Div why he's been snapping at people, Jerry tells Susan that she has a call. When Susan takes the call, the reflection of the boom pole is visible on the glass partition near Carter, and then the reflection of the boom operator holding up the boom pole becomes visible before Susan walks away.
Visible crew/equipment: While Doug is treating the animal-rights activist, Francis sees Tag plucking the turkey in the next room, and when he asks Doug to shut the blinds, the reflection of the moving boom microphone is visible on the window's glass.
Visible crew/equipment: While Carol is at the admit desk, Linda returns to the ER, and as Linda says, "My Lexus just got snowplowed in; could I use the phone?" the reflection of the moving boom pole is visible on the partition.
Visible crew/equipment: Susan searches for a surgeon for Mr. Bozinsky's aortic aneurysm. When Bozinsky has coded, Bob cuts the man open, then does the cross-clamp procedure herself, and in a couple of Wendy's close-ups, the reflection of the boom microphone is visible on her safety glasses.
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.
Visible crew/equipment: While Jerry is watching TV news about the snowstorm, Mark asks him how the desktop paging microphone works. Then, as Jerry walks toward Mark, the reflection of the boom operator moving with the boom mic is visible on the glass partition.
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)
Answer: It was in "Chaos Theory" which is the first episode of season 9 (time code 00:13:55).
Super Grover ★