The penultimate entry in Universal's "Sherlock Holmes" series, Terror by Night takes place almost exclusively on a speeding train, en route from London to Edinburgh. Holmes (Basil Rathbone) is on board to protect a valuable diamond from the clutches of master criminal Colonel Sebastian Moran. The trouble is, Moran is a master of disguise, and could be just about any one of the other passengers. Murder and mayhem plague the train excursion before Holmes can successfully complete his mention. Poor old Dr. Watson (Nigel Bruce) is a bit denser than usual here, though his ingenuousness is cleverly woven into the script. Alan Mowbray, who played Inspector Lestrade in the 1932 Clive Brook adaptation of Sherlock Holmes, is seen in a pivotal supporting role. One of three "Holmes" entries currently in the Public Domain, Terror by Night is also available in a computer-colorized version (but stick with the original black and white).