William Schallert, a familiar presence on prime-time television for decades, notably as the long-suffering father and uncle to the “identical cousins” played by Patty Duke on the hit 1960s sitcom “The Patty Duke Show,” died on Sunday in Pacific Palisades, Calif. He was 93.
https://www.nytimes.com/2016/05/10/a...ies-at-93.html

He also made a number of guest appearances on Star Trek and The Twilight Zone.