Character actor in numerous television series, but primarily known for his work on stage, who finally got a series regular role as Dr. Will Hayward in the 1990's cult classic television series Twin Peaks.
He was a Teacher at the University of Minnesota and served as the Artistic Director of The Chimera Theater in St. Paul.
He had a memorable role in the film adaptation of the novel Slaughterhouse Five.
He was the father of Twin Peaks co-creator Mark Frost, Actress Lindsay Frost and Writer Scott Frost. His grandson is baseball player Lucas Giolito.
He acted alongside Jason Alexander in Seinfeld, playing the father of Alexander's fiance Susan.
