Thomas & Friends S02E10 - The Runaway

Based on the story of the same name from More About Thomas the Tank Engine.

Thomas isn't feeling well and is sent to the Works to be mended. Duck takes over Thomas' duties. Soon, Thomas returns from the Works with stiff handbrakes. This proves disastrous when a temporary fireman forgets to tighten them properly, sending Thomas, Annie and Clarabel on a runaway.