Summary: Today in a bonus episode of "Down These Mean Streets," we'll hear from three radio detective stars who took home Oscars: Rex Harrison as Rex Saunders in "Worth More Than Its Weight in Murder" (7/25/51); Frank Sinatra as Rocky Fortune in "The Catskills Cover-up" (2/9/54); and Edmond O'Brien as Johnny Dollar in "The Jackie Cleaver Matter" (3/31/51).