Ključna riječ Locomotive

Doc Brown (Christopher Lloyd) slučajno je poslan natrag u 1885. kada ga je pogodio grom. No, uspio je poslati Martyju (Michael J. Fox) pismo, napisavši u gdje se nalazi vremenski stroj. Napisao je kako ne dolazi po njega i da uništi stroj čim se vrati u 1985. Marty počne raditi s Docom iz 1955. i oni iskopavaju De Lorean iz rudnika. Prije nego što su napustili rudnik, otkrivaju nadgrobnu ploču na kojoj piše kako je tu 1885. pokopan Doc. Doca je u leđa upucao Biffov pradjed Buford "Ludi pas" Tannen zbog osamdeset dolara. Marty odlučuje, unatoč Docovim uputama, vratiti se u 1985. kako bi spasio prijatelja.

Thomas & Friends is a British children's television series, which had its first broadcast on the ITV network on 4 September 1984. It is based on The Railway Series of books by the Reverend Wilbert Awdry and his son, Christopher Awdry. These books deal with the adventures of a group of anthropomorphised locomotives and road vehicles who live on the fictional Island of Sodor. The books were based on stories Wilbert told to entertain his son, Christopher during his recovery from measles. From Series one to four, many of the stories are based on events from Awdry's personal experience.