Overview
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 woman's son is murdered and the diamond stolen and any of the passengers in their car could be the killer thief.
Cast
- Basil Rathbone as Sherlock Holmes
- Nigel Bruce as Dr. John H. Watson
- Alan Mowbray as Major Duncan-Bleek
- Dennis Hoey as Inspector Lestrade
- Renee Godfrey as Vivian Vedder
- Frederick Worlock as Prof. William Kilbane
- Mary Forbes as Lady Margaret Carstairs
- Skelton Knaggs as Sands - Moran's Accomplice
- Billy Bevan as Conductor Taking Tickets
- Geoffrey Steele as Roland Carstairs