Diesel is in disgrace. Not only had he destroyed Sir Topham Hatt's new paint store, he had also damaged himself so badly that he needed to be sent away for repair.
His replacement is Paxton, another class 08 diesel electric shunting locomotive. He is a friendly and helpful engine. If he has a fault, it is being too trusting, and a repaired Diesel might just take advantage of this!
No trucks were harmed in the making of the video!
