Draft:Thomas & Friends: Blue Mountain Mystery

Thomas & Friends: Blue Mountain Mystery is a 2012 computer-animated film in the Thomas & Friends franchise. It stars Ben Small and Martin Sherman as Thomas the Tank Engine in the United Kingdom and United States respectively. It also stars Keith Wickham, Teresa Gallagher, David Bedella, William Hope and Michael Brandon. Written by Sharon Miller, with Andrew Brenner serving as script editor, the film follows Thomas as he solves a mystery related to a narrow-gauge engine named Luke, with the latter making his debut in this film.

The film was released theatrically in the United Kingdom on September 1, and received a worldwide DVD release on September 3.

Plot
At the Blue Mountain Quarry, a keystone in Blondon Bridge comes loose, causing the bridge to collapse onto Paxton the diesel engine as Rheneas goes over it. Due to this causing heavy damage to Paxton, Sir Topham Hatt sends Thomas to work at the quarry in Paxton's place whilst he is being repaired. During his time there, Thomas unintentionally witnesses a small green engine hiding in the quarry. After attempting hide information about the green engine, Skarloey reluctantly and cryptically informs Thomas that the engine is named Luke, and that he hides in the quarry due to being scared of something he did a long time ago. Thomas promises not to tell anyone else about Luke.

The next day, after Thomas saves Skarloey from being hit by Rocky the crane, Luke leaves his hiding spot and befriends Thomas. When Hatt visits the quarry to inform Thomas that Paxton has been repaired and that he can return to his branch line, Thomas asks Luke what he did to prompt him to hide away. Luke reveals that, when he first arrived on the Island of Sodor, he knocked a yellow engine into the sea due to wanting to be unloaded from the ship first, thus traumatizing him. When Thomas leaves the Blue Mountain Quarry, he becomes dedicated to finding out who the yellow engine was. When he searches the Vicarstown Dieselworks, he finds Paxton telling Devious Diesel about Luke after overhearing Thomas and Luke's previous conversation. When Thomas then visits the Steamworks to ask Victor if he had fixed a yellow engine who fell into the sea, Victor reveals that the yellow engine was him. He explains that his wheel chains broke whilst overseas and was unsecured, but could not inform the crew due to speaking a foreign language.

Realising that what Luke did was an accident, Thomas rushes back to the Blue Mountain Quarry to inform Luke of the news. However, the narrow-gauge engines misunderstand Thomas and believe he broke their promise and exposed Luke to the other engines. When Diesel and Paxton enter the quarry, with the former threatening Luke that he will be sent away from Sodor forever, Thomas desperately asks Owen the incline to lift him to the top where Luke is. When he eventually reaches the top, he loses control due to the narrow-gauge track being too small and stops on the edge of a cliff. Luke subsequently rescues Thomas and tows him back onto Owen. When Sir Topham Hatt and Mr. Percival arrive in Winston the railway inspection car to scold Thomas based on Diesel's false accusations, Paxton returns with Victor, who forgives Luke and invites him to be repainted at the Steamworks. Hatt forgives Thomas for not working on his branch line in favour of discovering the full story, and Mr. Percival welcomes Luke onto his narrow-gauge railway.

Cast
Michael Legge joined the cast as Luke, with David Bedella taking over the role of Victor in the UK from Matt Wilkinson. This is also the last Thomas & Friends special to feature Michael Angelis and Michael Brandon as narrators, with Mark Moraghan succeeding them from King of the Railway (2013) onwards.