Thomas & Friends: Temporada 17, Episódio 7

17 - 7: Henry's Hero

Henry and Hiro take on some bad coal and start puffing out black smoke, but they do not notice until Duck informs them about it. Henry is worried and goes back to the sheds to wait for the new shipment of coal, but Hiro is determined to get his jobs done, regardless of the coal he's burning.