On Sir Topham Hatt's railway, the winter season is a very special time of year and all the engines work exra to make the holidays special. But it's not always easy. Find out what could happen if the villagers of Sodor don't get their Yule tree for the winter celebration. See if Percy's snow-covered face tricks James and the rest of the engines into thinking they have seen a very scary Jack Frost. Whatch if Duc is able to get to Farmer McColl's lambs in time to save them from bieing trapped in the snow. Join Thomas and his very useful friends for some snowy adventures as they work to keep the winter season on track.