Premise: Thomas, Edward, James, Gordon, Percy, Henry and Toby -- plus Emily, the first female steam engine -- all report to Sodor Railway director Sir Topham Hatt. Living on the imaginary island of Sodor, these friendly tank engines practice good manners and know the value of hard work. Each show closes with a musical finale.
Both Cranky and Thomas drop a Christmas parcel that needs to be delivered to Sir Topham Hatt; snow causes trouble for the engines.
Hiro becomes derailed when Thomas accidentally spills his cargo on the tracks; Spencer's story about the abominable snowman frightens Henry.