Don Mitchell, a Co-Star on TV's "Ironside," Dies Don Mitchell, an actor best known for playing Raymond Burr's assistant on the NBC police drama "Ironside" in the 1960s and "70s, died on Sunday at his home in Encino, Calif. His death was confirmed by Joseph Babineaux, the publicist for one of his daughters, the actress Julia Pace Mitchell. "Ironside" starred Mr. Burr as Robert T. Ironside, a retired detective who used a wheelchair. Mr. Mitchell played Mark Sanger, an ex-convict who became Ironside's bodyguard and assistant. He remained with the show from its debut as a made-for-TV movie in 1967 until it went off the air eight seasons later; along the way his character joined the police force and became a judge. Mr. Mitchell also appeared on shows like "I Dream of Jeannie," "The Fugitive" and "The Virginian," and with Pam Grier and William Marshall in the 1973 film "Scream Blacula, Scream." According to most sources, Donald Michael Mitchell was born on March 17, 1943, in Houston. He studied acting at the University of California, Los Angeles. He reprised the role of Mark Sanger in his last credited acting role, in the TV movie "The Return of Ironside," in 1993. His marriages to the actress Judy Pace and to Emilie Blake Walker ended in divorce. In addition to Ms. Pace Mitchell, he is survived by another daughter, Shawn Meshelle Mitchell. A remake of "Ironside," starring Blair Underwood in the Raymond Burr role, appeared on NBC this fall without a Mark Sanger. It was canceled after a handful of episodes.