Wrong Road - S2-E22
Revealing mistake: Wires are visible on Gordon's and Edward's buffer beams, and light bulbs are also sticking out from their lamps.
Wrong Road - S2-E22
Revealing mistake: When Gordon says, "I am Gordon! Stop! Stop!", his eyes are wonky.
Wrong Road - S2-E22
Revealing mistake: When Edward crosses the viaduct, the last coach of his train does not have lighting.
Wrong Road - S2-E22
Character mistake: The narrator refers to the brake coach as the guard's van.
Answer: Butch the breakdown truck must have pulled Gordon's tender all the way up the rails so the breakdown train can reach it and also Butch helped to get Gordon close to the winch.