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When trouble strikes at the Blue Mountain Quarry, Thomas is sent to help his Narrow Gauge engine friends. While shunting and hauling, he catches a glimpse of a small engine trying to hide, yet no one will provide any clues to the engine's identity. Thomas is determined to get to the bottom of the mystery but discovering the truth is harder than he imagined! Will Thomas be able to save his new friend? Or will the mysterious engine be sent away from Sodor forever? Travel on an exciting journey with Thomas and his friends in his biggest movie ever, tracking down clues, discovering lost engines, and revealing the power of friendship!
Narrator (UK) (voice)
Various characters (voice)
Paxton (voice) / Peter Sam (voice)
Luke (voice)
Victor (voice) / The Cuban Dock Workers (voice)
Diesel (UK), Various characters (US) (voice)
Emily / Mavis (UK), Annie and Clarabel (voice)
Thomas / Toby (UK), Rheneas / Owen (voice)
Narrator / Diesel (US) (voice)
Thomas / Percy (US) (voice)
Edward / Toby / Rocky (US) (voice)
Emily / Mavis (US) (voice)
Cranky (US) (voice)
September 18, 2012
Narrator (UK) (voice)
Various characters (voice)
Paxton (voice) / Peter Sam (voice)
Luke (voice)
Victor (voice) / The Cuban Dock Workers (voice)
Diesel (UK), Various characters (US) (voice)
Emily / Mavis (UK), Annie and Clarabel (voice)
Thomas / Toby (UK), Rheneas / Owen (voice)
Narrator / Diesel (US) (voice)
Thomas / Percy (US) (voice)
Edward / Toby / Rocky (US) (voice)
Emily / Mavis (US) (voice)
Cranky (US) (voice)
Similar to Thomas & Friends: Blue Mountain Mystery
