Diesel # 10 has devious plans to dominate the other engines by finding and crushing their dwindling supply of magical gold dust. Lilly has a hunch that her grandfather holds the key to rescuing the little trains in his workshop on Muffle Mountain.

Thomas and his friends learn many lessons about working together and getting along with each other.

In Percy's Promise, Percy braves a storm to keep his promis to get the children home from the beach. In Percy Takes the Plunge, Percy disobeys a danger sign and is pushed into the sea.

Thomas, Gordon, and the other trains try to deliver an urgent package to Sir Topham Hatt as quickly as possible.

After staying up late to boast about his special assignment, James is unable to get up on time the next morning, and Thomas and Percy have to take passengers to the royal parade. Includes sound effects.

James, a red train engine, tries to get rid of a group of bees that are plaguing him.

Thomas the tank engine balks at having to wear a snowplow until he sees how valuable it is in helping his friend Toby.