Character mistake: The narrator says, "some trucks were left behind", but only 1 truck was left behind.
Percy Takes the Plunge - S2-E11
Character mistake: Henry says "This shed is for the Fat Controller's Engines!" to Bill and Ben, but they ARE the Fat Controller's engines.
Suggested correction: Bill and Ben were not owned by the Fat Controller.
Character mistake: The driver said that Bill and Ben's names and numbers would be taken away, but the twins do not have numbers.
Wrong Road - S2-E22
Character mistake: The narrator refers to the brake coach as the guard's van.