Don Mitchell, who co-starred in the original Ironside, died of natural causes on Dec. 8, the Los Angeles Times reports. He was 70.
Mitchell played Mark Sanger, the ex-con-turned aide to Raymond Burr's wheelchair-bound Robert T. Ironside on the NBC series, which ran from 1967 to 1975. He later reprised the role in the 1993 reunion TV movie.
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Mitchell's other credits include Scream Blacula Scream, Matlock, Capitol and I Dream of Jeannie.
Mitchell is survived by two daughters from his second marriage to actress Judy Pace.