James' career took a sudden upturn in the early 1980s with several sharply defined character roles in films such as Southern Comfort and 48 Hrs. (which were both directed by Walter Hill), but it was his performance as Leon Kowalski in the 1982 film Blade Runner that gave him his greatest, most lasting fame. Even though his memorable performance threatened to typecast the intense yet versatile actor as a movie villain for the remainder of the decade, James continued to pile up a prolific acting resume, playing significant roles in Enemy Mine, Flesh + Blood, A Breed Apart, Silverado, Armed and Dangerous, Red Heat, Steel Dawn, Red Scorpion, Tango & Cash and Showdown (portraying an obnoxious high-school vice-principal, Kowalski, whose name was probably an inside joke inspired by Blade Runner). James continued his strong work on the small screen as well, with guest spots in Benson, Quincy, M.E., The A-Team, Little House on the Prairie, The Dukes of Hazzard, Matlock, Miami Vice, Sledge Hammer!, and Dynasty. In the 1990s, he appeared in Highlander: The Series, and as Sheriff Bowman in the Millennium season 2 episode "Luminary". He lent his voice to the character of Parasite in Superman: The Animated Series. In 1982, he was in the made-for-TV-movie Hear No Evil as Billy Boy Burns.