Thomas & Friends - Season 13 Episode 17 Snow Tracks

A snowstorm has covered Sodor, and Thomas and Gordon are given important jobs. While doing his job, Gordon decides to take the shorter, hilly route because he thinks he is special and stronger. He slips several times, spraying Spencer (who is there with the Duke & Dutchess Of Boxford on a visit) with snow and crashing into some slate cars. While climbing Gordon's Hill, he inadvertently creates a giant snowball that starts to roll back. It derails Thomas, who had been following him. While he's delivering his load, Gordon collects Rocky to put Thomas back on the rails. Then he helps Thomas do his job. That night, Gordon announces that no engine is special and they're all the best.