His son Zak Olkewicz, a screenwriter, confirmed to EW that his father passed away Tuesday morning.
Olkewicz was perhaps most beloved by audiences for his work in theTwin Peaksuniverse.
Olkewicz made his final screen appearance in the role in 2017, as part of the Showtime revival.

Walter Olkewicz in ‘Wizards and Warriors’.Warner Bros. Television / courtesy Everett Collection
It marked his first role in nearly 15 years.
He recurred in the role for the show’s first four seasons.
AndSeinfeldobsessives will recognize Olkewicz as Nick the cable guy, from the 1996 episode “The Cadillac.”
Olkewicz was born May 14, 1948, in Bayonne, N.J.
He made his screen debut in 1976’sFutureworldand landed a more featured role inSteven Spielberg’s 1979 war comedy1941.
But Olkewicz was most prolific in television.
Oklewicz is survived by his son, daughter-in-law, and two grandchildren.