The Builders - S1-E2
Visible crew/equipment: When the Major says "He lost it you know" to Polly before entering the dining room, the silhouette of a boom mic can be seen on the top right hand of shot. (00:25:20)
The Builders - S1-E2
Visible crew/equipment: When Stubbs says to keep the door closed, a boom shadow is seen on the wall by the door. (00:27:20)
The Builders - S1-E2
Visible crew/equipment: When Polly passes Basil the stapler, a boom mic can be seen lifting up out of shot in the top left corner of the screen.
Chosen answer: Indeed it is Polly. She has stuffings in her mouth to pretend she is swollen.
Mortug