Thomas & Friends (1984)

S19E7 The Beast Of Sodor

After Spencer jests about the existence of a yeti lurking in the snowy hills, Henry's imagination runs wild, leading him to fear an encounter with the mythical creature. His anxiety grows as he starts to see signs of the beast everywhere, causing him to act increasingly suspicious and jumpy. Despite his friends' reassurances, Henry struggles to shake off the idea, leading to a series of humorous misunderstandings on the tracks as he tries to avoid what he believes could be a terrifying confrontation.