Played the role of Ben Cartwright on TV's Bonanza for 14 years and followed it up with a role in the quickly canceled crime show, Griff.
He earned the nickname, Chaim at an early age from his mother.
Originally from Ontario, Ottawa - he acted in a number of TV shows including Battle Star Galactica.
He married Rita Hands in 1938, and together the couple had twins.
He starred in TV's hit series, Bonanza with Pernell Roberts.