As we head into the home stretch of summer, here are four seasonal radio mysteries. Frank Lovejoy stars as the owner of a summer resort in dire financial straits who may have turned to murder to keep the lights on in "Last Night" from The Mollé Mystery Theatre (originally aired on NBC on February 22, 1946), and in a syndicated mystery, Boston Blackie finds a marriage racket when he heads to a dude ranch for vacation. A man spends a hot night trying to get rid of a surprise corpse in "Summer Night" from Murder By Experts (originally aired on Mutual on June 13, 1949), and William Gargan discovers strange affairs afoot at a resort in "Midsummer Lunacy" from Barrie Craig, Confidential Investigator (originally aired on NBC on August 17, 1954).