Art O'Dougherty (1 episode, 2006)
Dr. Ronald (2 episodes, 2008)
Dan Wilmott / ... (2 episodes, 1979-1984)
Larry Wilson (2 episodes, 1982)
Arthur / ... 2 episodes, 1978-1980
Jerry Tabor (1 episode, 1977)
Adam Simms (2 episodes, 1977-1978)
Agent Mike Wolf / ... (4 episodes, 1974-1979)
Alex Harmon / ... (4 episodes, 1974-1980)
Pvt. Jack Scully / ... (3 episodes, 1979)
Dr. Benjamin Blakely (1 episode, 1974)
David's Brother / ... (3 episodes, 1971-1976)
Dr. MacMurray / ... (2 episodes, 1974-1976)
John Moore / ... (3 episodes, 1971-1973)
Paul / ... (2 episodes, 1970-1975)