The World's Strongest Engine

The World's Strongest Engine is a Season 6 episode. Henry is ill again, and unfortunatley Diesel was the only engine avalible again! He was boasting he was the worlds strongest engine, but the trucks decided to trick him. They encouraged him to pull them all but they had their brakes on. Not learning his lesson from Pop Goes the Diesel, he then proceeded to try and pull them, only to end up falling into a boat at the quay. Henry then came back and pulled away the trucks.