Thomas & Friends: Season 1, Episode 13

1 - 13: Thomas, Terence and the Snow

Based on the story of the same name from Tank Engine Thomas Again.Thomas meets Terence the Tractor, and says his wheels are ugly. Terence explains that they're caterpillar tracks, and he can go "anywhere". This comes in handy during the winter when Thomas doesn't use his snowplough and gets stuck in a snowdrift.