1941's Republic version of the radio series "Mr. District Attorney" is far more lighthearted than its source, starring Dennis O'Keefe as Prince Cadwallader Jones, rookie assistant to DA Winton (Stanley Ridges), assigned to an old case involving the missing Paul Hyde (Peter Lorre), whose hidden cache of embezzled loot mysteriously turns up at the race track. There are red herrings and murder victims, but it's a waste of Lorre, in a criminally small role. Florence Rice supplies much comedy as nosy reporter Terry Parker, who also shows a tendency to get into hot water. The 1947 version from Columbia was probably more faithful than this one, certainly more serious; highly enjoyable in a breezy style, upper class for Poverty Row's Republic Pictures, who followed it with a pair of little seen sequels, "Mr. District Attorney in the Carter Case" and "Secrets of the Underground" (both featuring different actors in the lead).