Born in the small South Dakota city of Mitchell, Carlson earned both a BFA and a MA from the University of South Dakota,[1] which he attended in the 1950s and began his acting career performing in several stage plays in both the U.S and England.
His performances include A Walk in the Woods in 1991 at the Gateway Theatre and Glengarry Glen Ross, Jekyll & Hyde (musical), Hamlet, Joggers, All My Sons and Death and the Maiden.
He immigrated to Canada in the late 1960s and began acting in many films and TV shows in the early '70s.
Carlson appeared in four movies from director David Cronenberg, including Videodrome and The Dead Zone.
His TV appearances include The X-Files, Friday the 13th: The Series, 21 Jump Street and Road to Avonlea.