Many engines have been known live and work on the Mainland, such as Stepney, Flying Scotsman, Spencer, Connor, Caitlin, Samson, Logan, The Mainland Diesels, Ulli, Lexi, Theo, Merlin, Hurricane and Frankie.
The Mainland has made several appearances in the Railway Series. In the television series, it's first appearance was in the fourth season episode, Thomas and the Special Letter. In the CGI series, the Mainland has been mentioned several times and briefly seen whenever the Vicarstown bridge appears. Crovan's Gate was once used as a station on the mainland. The Mainland makes its first full appearance in The Great Race and appears in Journey Beyond Sodor.