Perry Mason· Season 9 · Episode 28The Case of the Positive NegativeS09E28·May 1, 1966·1h·CBSStreaming on (US) See allShareGuest starsParley Baeras Frank CummingsBettye Ackermanas Laura BrandonTed de Corsiaas George EmoryPreviousThe Case of the Misguided ModelS09E27NextThe Case of the Crafty KidnapperS09E29Keep going