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.
Edward, Trevor and the Really Useful Party - S3-E16
Visible crew/equipment: When Bertie is talking to Trevor, in one shot of Trevor, studio equipment is visible in the top left hand corner.
Visible crew/equipment: When Bill and Ben go by a level crossing, the top of the set is visible.
Other mistake: When the narrator says "the conductor blew his whistle" the conductor is holding his green flag but he is not blowing his whistle.
Edward, Gordon and Henry - S1-E4
Visible crew/equipment: In the beginning shot of Gordon leaving the station, studio equipment is reflected off James' tender.
Edward, Gordon and Henry - S1-E4
Continuity mistake: When Edward arrives and tries to push the coaches. In one shot of Gordon on the siding in front of Henry, Gordon's eyes go to his left without moving.
Thomas, Percy and Old Slow Coach - S5-E16
Other mistake: When James cries for help, his eyes are wonky.
Continuity mistake: After Toad avoids James, a works coach moves from in front of the points to behind the points.
Revealing mistake: The rails to the buffers are broken as Toad leaves the siding.
Revealing mistake: When Toad switches lines to avoid Gordon, the track ends in bushes.
Visible crew/equipment: When Toad falls into the pond, in the shot from his point of view, studio equipment can be seen in the top left corner.
Continuity mistake: In the shot of Thomas stopping inside Knapford with his coaches, Henry is in his new shape.
Continuity mistake: When Henry leaves the docks, there's nothing on his footplate, but when he's out of the docks, there are suddenly 2 lamps on his footplate.
Revealing mistake: When Gordon puffs into the ditch his face looks wonky and wires are visibly attached to his cab.
Visible crew/equipment: At the beginning, a camera is visible in the top right corner.
Other mistake: The narrator says "the road left the railway...", but there is a road right next to Thomas.
Tenders and Turntables - S1-E15
Visible crew/equipment: In the close-up of James spinning on the turntable a crew member's face is reflected in his paintwork.
Thomas, Terence and the Snow - S1-E13
Visible crew/equipment: In the shot after Thomas pulls out of Knapford Station, the end of the set is visible.
Visible crew/equipment: When Thomas is on the turntable, a camera shadow is visible on the left.
Other mistake: When Thomas shunts Annie and Clarabel his eyes look wonky and Annie and Clarabel are missing their names.
Answer: Breakdown trains help the engines back on track.