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
Sherlock Holmes
Dr. John H. Watson
Major Duncan-Bleek
Inspector Lestrade
Vivian Vedder
Prof. William Kilbane
Lady Margaret Carstairs
Sands - Moran's Accomplice
Conductor Taking Tickets
Roland Carstairs
Mrs. Shallcross (uncredited)
Alf Shallcross (uncredited)