John attended Long Beach State University.
John is 6'2" (1.88 m).
John married actress Laurette Spang on February 16 1980. Together they have three children, Jake, Becky, and Molly.
John was married to actress Juliet Prowse from 1972 until they divorced in 1979. They have one child together, named Seth.
John was married to Marilyn McPherson from 1962 until they divorced in 1971.
Married to Laurette Spang, Cassiopeia in the original Battlestar Galactica.
John: (on Susan Flannery) She is so funny, talented and smart, and she works with such authority. I give her a bad time by teasing, 'There is no leading man in Hollywood who would have been on the show with you all of these years'. She goes, 'I know. I'm so lucky to have you!'