Movies:
* The Greatest American Hero (1981) - His breakout role as Ralph Hinkley, a high school teacher who gains superpowers from an alien suit.
* The House on Sorority Row (1983) - A horror film where he plays a former fraternity president who becomes a suspect in a series of murders.
* Carrie (1976) - He plays Tommy Ross, the popular high schooler who has a romantic interest in Carrie White.
* Big Trouble in Little China (1986) - He plays a hapless tourist in this action-comedy film starring Kurt Russell.
* The Twilight Zone: The Movie (1983) - He stars in the segment "It's a Good Life" as a grown-up Anthony Fremont.
* The Running Man (1987) - He plays a game show contestant who has to survive a deadly televised competition.
* The Blob (1988) - A remake of the classic horror film where he plays a police officer investigating a mysterious creature.
Television:
* The Greatest American Hero (1981-1983) - He played the titular hero in this popular television series.
* The Powers of Matthew Star (1982-1983) - He starred in this science fiction series as a young alien with superpowers.
* The Colbys (1985-1987) - He played a recurring role as the character of Jeff Colby.
* The Newhart (1982-1990) - He guest-starred in multiple episodes of this sitcom as various characters.
* The Nanny (1993-1999) - He made a guest appearance as Mr. Sheffield's old friend, a magician, in one episode.
* Walker, Texas Ranger (1993-2001) - He guest-starred in several episodes of this action series as various characters.
* Charmed (2000-2006) - He had a recurring role in this supernatural series as the character of Dr. Gregory.
* The Mentalist (2008-2015) - He played the role of Senator Jeffrey Levin in one episode.
* Supernatural (2005-2020) - He appeared in the episode "Fan Fiction" as a character named "The Trickster" in a story within a story.
* Grey's Anatomy (2005-present) - He played a patient with a rare disease in one episode.
* Castle (2009-2016) - He played a suspect in one episode.
* The Good Doctor (2017-present) - He played a patient with a rare disease in one episode.
He has also appeared in numerous other television films and series, making him a familiar face on both the big and small screen.