Visible crew/equipment: Brandon and Dylan are in their hotel room and Brandon is talking to Kelly on the phone. Right after she says, "Are you sure you two aren't shackin' up with some biker babes?" it goes back to Brandon and you can see a boom mic above his head. It then continues until about when Dylan walks out of the bathroom.
Christmas Comes This Time Each Year - S5-E15
Visible crew/equipment: When Christine Petit opens the door and says "Hello Dylan" and Dylan says "Christine" the other agent walks out of the room and as he is closing the door a microphone is seen above Christine's head. (00:18:00)
Answer: There was no explanation. Usually, when a show doesn't know if it's going to be picked up or not, they will use stock footage until they can spend the money on a real location.
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