Outside of stints on Twin Peaks and Grace Under Fire, Walter took part in plenty of other famous television shows and movies during his career. He also starred in The Last Resort from 1979 to 1980, Wizards and Warriors in 1983, Partners in Crime in 1984, and as a character on Dolly Parton’s variety show for a year in 1987.

His skills weren’t only showcased on cable, however — Walter starred in a bunch of well-known movies, too. He appeared in the 1994 legal thriller The Client, Steven Spielberg’s 1979 film1941, the 1984 hit Making the Grade, Christopher Guest’s 1989 film The Big Picture, 1995’s Stuart Saves His Family, and 2002’s Par 6.

The actor was born in Bayonne, NJ, and had quite an impressive educational background prior to pivoting towards acting. He went to school at Bayonne High School, St. Mary of the Plains College in Kansas, as well as Colorado State University. 

After completing his studies, Walter starred in his first role in the 1976 hit Futureworld. From then until his illnesses became insurmountable, Walter worked tirelessly as an actor and has left behind an enduring legacy.

Source : https://www.distractify.com/p/walter-olkewicz-cause-of-death