Thomas & Friends: Temporada 20, Episódio 15

20 - 15: Useful Railway

Based on the story of the same name from Small Railway Engines.Mike is annoyed of always being stuck behind animals, Rex boasts to the small engines about how easy wool deliveries are. The Small Controller gives him the first wool train. Willie the tractor driver accidentally drops his load of wool onto the tracks, which causes Rex to derail.