Robert Cornthwaite
- The Primevals
2023 Lloyd Trent
- The Naked Monster
2005 Dr. Carrington
- Dead Man's Revenge
1994 Storekeeper
- Matinee
1993 Dr. Flankon (uncredited)
- Frame Up
1991 Earl Cott
- Time Trackers
1989 Dr. Alistair Craig
- Who's That Girl
1987 Minister
- Deal of the Century
1983 Huddleston
- Doctor Detroit
1983 Professor Blount
- Love's Savage Fury
1979 Dr. Tighe
- Futureworld
1976 Mr. Reed
- Crackle of Death
1976 Dr. Hartfield
- The Devil's Daughter
1973 Pastor Dixon
- The Six Million Dollar Man
1973 Dr. Ashburn
- Journey Through Rosebud
1972 Hearing Officer
- Killer by Night
1972 Dr. Bradville
- The Longest Night
1972 Frank Cavanaugh
- The Peace Killers
1971 Ben
- Environment
1971
- Two on a Bench
1971 Mr. Hayes
- Colossus: The Forbin Project
1970 First Scientist
- The Legend of Lylah Clare
1968 Studio Photo Archivist (uncredited)
- The Ride to Hangman's Tree
1967 Harper
- Waterhole #3
1967 George - Hotel Clerk
- The Ghost and Mr. Chicken
1966 Springer
- What Ever Happened to Baby Jane?
1962 Dr. Shelby
- The Devil's Ticket
1961 Mr. Spengler
- No Greater Love
1960 Dr. Bergman
- Ten Seconds to Hell
1959 Franz Loeffler
- Day of the Outlaw
1959 Tommy Preston, Wyoming Hotel Owner
- Destination Space
1959 Sen. Royce
- The Power of the Resurrection
1958 Caiaphas
- The Spirit of St. Louis
1957 Harry Knight - Lindbergh Student (uncredited)
- Hell on Devil's Island
1957 Gov. Renault
- The Leather Saint
1956 Dr. Lomas
- The Purple Mask
1955 Napoleon Bonaparte
- Stranger on Horseback
1955 Arnold Hammer
- Kiss Me Deadly
1955 FBI Agent
- Day of Triumph
1954 Simon the Zealot
- The Studebaker Story
1953 Frederick S. Fish
- The War of the Worlds
1953 Dr. Pryor
- Monkey Business
1952 Dr. Zoldeck
- Something to Live For
1952 Young Man (uncredited)
- The Thing from Another World
1951 Dr. Arthur Carrington
- His Kind of Woman
1951 Hernandez (uncredited)
- Gambling House
1950 Stefan (uncredited)
- Union Station
1950 Emergency Room Orderly (uncredited)
