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Remembered for his role as Jason on the beloved 1970s TV series The Waltons, Jon Walmsley was a seasoned performer when he joined the show's cast in 1971. The British born actor had been making the rounds in Hollywood for over five years, appearing in episodes of shows like Combat! and My Three Sons, but The Waltons would prove to be his big break. He stayed with the series until it ended its run in 1981, though Walmsley would reprise the role for subsequent Waltons TV movies, like 1982's A Wedding on Walton's Mountain. He later explored a career in music, playing guitar on the Richard Marx album Repeat Offender.