Need a case closed and a tune carried? Dick Powell is your man. The crooner reinvented his career when he played Philip Marlowe on screen, and he starred in a pair of radio detective shows as glib but tough private investigators. In honor of Powell’s birthday, we’ll hear two of his mysteries: as Richard Rogue, he solves “The Impossible Murder” from Rogue’s Galley (originally aired on Mutual on May 16, 1946). Then, as Richard Diamond, Private Detective, Powell tackles “The Big Foot Grafton Case” (originally aired on NBC on August 30, 1950).