Join Thomas the Tank Engine, Bruno the Brake Car and their friends for the premier of an all-new movie! When cargo cars go missing in the mines underneath Lookout Mountain, Thomas and the gang set out to solve the mystery. Together they learn there was a similar problem years ago. Why are all the cars disappearing in the mines? The mystery of Lookout Mountain takes the engines on a search for answers that leads them under waterfalls, into unknown tunnels, through the Crystal Caverns, and ultimately brings them face to face with a mythical Mine Monster! Added value includes an introduction from Chuck Smith, the voice of Bruno.