The Narrow Gauge Mission is a fan-fiction Thomas & Friends special that was first released in December 4, 2004.
Sir Topham Hatt's engines, Mr. Percival's narrow gauge engines and the Culdee Fell engines must work together to build the new Sodor Mountains. But when James, Gordon, Henry, Harmood, Duncan and Patrick are causing trouble, Duck must warn them to do it right.
- Donald and Douglas
- Sir Handel
- Peter Sam
- Sir Topham Hatt
- Mr. Percival
- UK Narrator: Michael Angelis.
- US Narrator: Ringo Starr.