Ron Harper Dies: ‘Land of the Lost’ & ‘Planet of the Apes’ Star Was 91

Actor Ron Harper, best known for playing Uncle Jack on Land of the Lost, and astronaut Alan Virdon on the Planet of the Apes television series, has passed away at the age of 91. He reportedly died after a battle with Alzheimer’s disease-induced dementia. His daughter, Nicole Longeuay, first shared the sad news on March 21 and later confirmed that he died of natural causes at home.