The September discs will carry five extras including two new songs. For the first time since Hero of the Rails, the special's title is not carried onto to the songs' titles.
The music videos It's Gonna Be a Great Day and Searching Everywhere are joined by a third, Working Together from Blue Mountain Mystery.
The Search for the Lost Crown becomes the special's DVD game while the Guess Who? puzzles return.
The description reads; Join Thomas & Friends as they embark on a legendary movie adventure! The steam team’s quest begins when a special guest arrives on Sodor with a big surprise and important jobs for Thomas, Percy and James.
The engines meet new friends and discover suits of armor; coats of arms and legends of long-ago heroes. Then their bravery is put to the test when their new friend Stephen goes missing.
Will Thomas find him in time? Will the engines discover the truth about the Island of Sodor’s biggest mystery? It’s a crusade of knightly proportions for Thomas & Friends in this epic movie!
King of the Railway: The Movie from Lionsgate Entertainment hits US DVD/Blu-ray shelves on September 17th 2013.
Thanks to MrTrainfan1000 for the alert.