Place your bets and ride along with four old time radio mysteries set in the stables and around the racetrack. Boston Blackie doubts a horse is guilty of murder in a syndicated mystery, and international investigator Frank Race tries to find out who's out to make sure a prize racehorse doesn't make it to the winner's circle in "The Adventure of the Vanishing Favorite." A jockey loses a race and his life in Crime and Peter Chambers (originally aired on NBC on August 3, 1954). And John Gielgud and Ralph Richardson are Sherlock Holmes and Dr. Watson in an adaptation of "Silver Blaze."