Holmes and Watson board a passenger train bound from London to Edinburgh, to guard the Star of Rhodesia, an enormous diamond worth a fortune belonging to an elderly woman of wealth; but within the first hour of the trip, the … Basil Rathbone, Nigel Bruce, Alan Mowbray, Dennis Hoey, Renee Godfrey, Frederick Worlock, Mary Forbes Added on Amazon Prime 2023-03-16.