Since Aunt Ada Came to Stay - S2-E9
Visible crew/equipment: Before Craig finishes speaking with Joanna and puts the car in reverse, a set crew member in a blue shirt is seen in the driver's side mirror.
Visible crew/equipment: The wire used to guide Danny's arrow is visible. (00:16:25)
Earthanasia AKA The End of the World Show - S7-E6
Visible crew/equipment: When Bill smashes the hole through the wall, a boom mic is visible at the top right of the screen.
Identified - S1-E1
Visible crew/equipment: Near the start, Henderson and Straker exit the plane and enter the Rolls-Royce, then just as the car passes the camera, the reflections of the camera, camera operator, and another crew member with an arm up holding a small screen are visible on the window. (00:03:40)
The Case of the Missing Doughnut - S1-E2
Visible crew/equipment: When the invisible Doughnut enters the bakers shop you can see the arm of a crew member moving behind the counter as the shop door opens.