In 2005 John portrayed John Forsythe in Dynasty: The Making of a Guilty Pleasure, a fictionalized television movie based on the creation and behind the scenes production of the 1980s prime time soap opera Dynasty.
Ben Cooper, Richard Crenna, John Forsythe, Ron Foster, Brad Johnson, Jack Kelly, Robert Loggia, Ida Lupino, Martin Milner, Leslie Nielsen, Mickey Rooney, James Whitmore, Jeffrey Hunter, Tippi Hedren, Telly Savalas, Robert Ryan and Michael Winkelman were among the actors cast on Kraft Suspense Theatre.
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Between 1960-1961 he appeared in five episodes of the television series Bachelor Father as Bentley Gregg's (John Forsythe) good friend Frank Curtis.
The best-selling book, in turn, spawned several filmed versions of the story: director Richard Brooks' theatrical feature film In Cold Blood in 1967 starring Robert Blake, Scott Wilson and John Forsythe, and a two-part made-for-television movie of the same title starring Eric Roberts, Anthony Edwards and Sam Neill that aired on network TV in 1996.
He also acted in popular television series of the '70's, such as Cannon, starring William Conrad, The Blue Knight, starring George Kennedy and To Rome with Love, starring John Forsythe.