He first took stage at the age of eight with his mother at the Petersburg Players Professional Theatre in Peterborough, New Hampshire, who frequently performed there.
He was previously married to fellow actor, Joanna Heimbold in February of 1994 until they later had their marriage annulled after 11 days.
[6][better source needed] Cox performed on Broadway with Ingrid Bergman in Captain Brassbound's Conversion before going to Hollywood in 1975 with the national company of Grease.
[1][7] Other film credits include Seizure (1974), Between the Lines (1977), Sanford and Son (1975), King of the Mountain (1981), Hellhole (1985), The Vindicator (1986), Zombie High (1987) and Radio Free Albemuth (2010).
[citation needed] He played a terrorist fighting for independence in the Star Trek episode "The High Ground" (1990).