Thomas, Percy and the Coal - S2-E1
Visible crew/equipment: In the restored version, studio equipment can be seen when Toby pulls Annie and Clarabel and at the water tower near Tidmouth Station (at the top of the screen in both scenes).
Visible crew/equipment: When Edward sees Trevor for the first time, the edge of the set is reflected on Edward's boiler.
The Runaway - S2-E10
Visible crew/equipment: When Harold is flying, in one shot, a stage light is reflected off his blades.
The Runaway - S2-E10
Visible crew/equipment: When Thomas leaves the station, a tripod is reflected off him.
Visible crew/equipment: When Diesel is on the turntable, camera equipment is reflected in the windows for several moments. (00:02:00 - 00:10:00)
Dirty Work - S2-E13
Visible crew/equipment: When Duck bumps a truck when the Troublesome Trucks are singing, "Pop Goes the Diesel", you can see a string pulling the truck.
Visible crew/equipment: When Duck is being pulled out by Thomas, from the shot inside the barber shop, a camera and other studio equipment is visible behind Duck.
Visible crew/equipment: When Bill and Ben are shunting, we can see hands. (00:02:00 - 00:10:00)
Visible crew/equipment: In the restored version, when Bill and Ben leave Brendam Docks, the twins do not disappear. They just stop right at the top of the screen. The end of the set can be seen in a still from the episode: also, two hands can be seen pulling them backwards with string.
Visible crew/equipment: When Bill and Ben leave Boco and Edward, a tripod is visible in the top right (visible in HD full screen version).
Visible crew/equipment: When Bill and Ben pass a station, you can see a bit of studio equipment at the top of the screen. (Visible in HD full screen version).
Visible crew/equipment: When Bill and Ben go by a level crossing, the top of the set is visible.
Visible crew/equipment: The reflection of a crew member's face is visible in the window of Edward's cab when his driver cheers him on.
Thomas and the Missing Christmas Tree - S2-E26
Visible crew/equipment: In the scene of Donald and Douglas going out of the yard, a camera tripod can be seen in the top left corner.
Answer: He was in the water.