In honor of April Fool's Day, our radio detectives this week have to contend with some practical jokes and jokers that are anything but funny. Dr. Watson is enlisted to pull a prank on Sherlock Holmes in "The April Fool's Day Adventure," starring Basil Rathbone and Nigel Bruce (originally aired on Mutual on April 1, 1946). Dan Holiday tries to find a deranged jokester before his antics turn deadly in "Death is No Joke" from Box 13. A fake will reading turns into a real crime scene as Philip Marlowe hunts for a killer in "The Last Laugh" (originally aired on CBS on April 2, 1949), and Detective Danny Clover has to find out who killed a celebrated prankster in "Laugh-a-Minute Tyler" from Broadway is My Beat (originally aired on March 14, 1953).