The Streets of San Francisco: Letters from the Grave on AllMovie

As is customary, Stone (Karl Malden) and Keller (Michael Douglas) are faced with a baffling mystery which they must unravel in the episode's alotted sixty minutes. The game is afoot the moment that the skeleton of a former convict is found during an excavation on Alcatraz Island. There's only one problem: this particular convict was supposed to have escaped from "The Rock" in the 1950s--and in fact, is still purportedly sending letters to his family! Featured in the cast are two seasoned veterans of radio's Golden Age: Paul Stewart and Virginia Gregg.