Red Thumb Mark

Runtime: 385 minutesValuable diamonds are missing, and the thumb-print of one Reuben Hornby is discovered in some blood at the bottom of the safe from where they were taken. But is all as it seems? Doctor John Thorndyke has some doubts about the evidence, but to prove the innocence of a young man he must make his case in open court through the use of the latest Edwardian science. Will Dr. Thorndyke succeed, or will the case of the red thumb mark prove to be not only his first case, but also his last?