'Perry Mason' ended in 1966; Talman, of course, was actually kicked off the show briefly in the early '60s(he attended a party in Hollywood, 'bustd' by police, at which many patygoers smoked marijuana, and was fired for violating the 'morals clause' in his contract; he was eventually re-hired).landtuna said:I'm surprised no one has mentioned Dan Blocker ("Hoss" on Bonanza).
Also coming to mind (although I'm not sure "Perry Mason" was still actually in production) was William Tallman (DA Hamilton Burger) who was in the series The Invaders when he died.
I was not aware he was involved with 'The Invaders'; he(like Yul Brynnner would do in '85) recorded an anti-smoking PSA just before his death, which was withhheld from air until after he'd passed on.