Don Nelson, brother of the late Ozzie Nelson and the co-writer of 216 episodes of classic sitcom "The Adventures of Ozzie & Harriet" (pictured above), which centered on the Nelson family, died of an aortic aneurysm on Tuesday in Studio City, Calif. Nelson, who had Parkinson's disease, was 86.
Nelson also penned the 1952 feature "Here Come the Nelsons"; episodes of shows including "The Ghost & Mrs. Muir," "Julia" and "Nanny and the Professor"; and Disney features including "Herbie Goes to Monte Carlo" and "Hot Lead and Cold Feet."
His last writing credit was on the 1993 series "Droopy: Master Detective."
Nelson was also a jazz musician, singing and playing sax; he released two albums in the 1950s and appeared at San Fernando Valley venues for years.
Ozzie and Harriet Nelson and their sons Rick and David all predeceased Don, David most recently in 2011. (Don Nelson was 21 years younger than his brother Ozzie.)
He is survived by his third wife, Marilyn; two daughters; and four stepchildren.
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