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.
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.
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.
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.
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).
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.
Answer: Take care of your dad.