Thomas & Friends: Season 8, Episode 3

8 - 3: Thomas to the Rescue

Thomas is sent to work at the quarry with Mavis, though it turns out Diesel is there too. Diesel gives Thomas a hard time, declaring the Fat Controller is planning to scrap steam engines. The next morning, Salty brings fresh diesel fuel. Diesel boasts about it, but the fuel makes all of the diesels on the island sick.