That's the bell, and we're underway with four old time radio mysteries set in and around the world of boxing. First, a fight fixer winds up dead in "Death is a Knock-out" from Crime Club (originally aired on Mutual on June 12, 1947).  Frank Race investigates when a boxer dies in the ring in the syndicated mystery "The Adventure of the Fourth Round Knock-Out," and The Falcon solves "The Case of the Bellicose Boxer" (originally aired on NBC on January 28, 1951). Finally, Detective Danny Clover tries to find out who left a boxer for dead in the river in "The Harry Brian Case" from Broadway is My Beat (originally aired on CBS on July 11, 1953).