Garrison's Gorillas
1967
Spy Smasher Returns
1966 · Col. Von Kahr
The Prize
1963 · Mr. Rolfe Bergh - Chaperon
Decision at Midnight
1963 · Uncle
Saints and Sinners
1962 · Otto Masuis
The Pigeon That Took Rome
1962 · Col. Wilhelm Krafft
On the Double
1961 · Oberkommandant
The Rebel
1959 · Frank Gottwald
A Private's Affair
1959 · Dr. Leyden
One Step Beyond
1959 · Josef
One Step Beyond
1959 · Dr. Heinrick Swansen
77 Sunset Strip
1958
Frankenstein 1970
1958 · Wilhelm Gottfried
She Demons
1958 · Col. Karl Osler
The Walter Winchell File
1957
Alfred Hitchcock Presents
1955 · Cafe Host
The Snow Creature
1954 · Dr. Louis DuPont
A Star Is Born
1954 · Mr. Ettinger (uncredited)
Jungle Gents
1954 · Dr. Goebbel
Magnificent Obsession
1954 · Dr. Albert Fuss
King Richard and the Crusaders
1954 · Austrian Knight (uncredited)
Silver Needle in the Sky
1954 · Dr. Loran
Captain Scarface
1953 · Dr. Yeager
South Sea Woman
1953 · Capt. van Dorck
Phantom from Space
1953 · Dr. Wyatt
Adventures of Superman
1952
Adventures of Superman
1952 · Dr. Rudolf Albrecht
Dangerous Assignment
1952
Target Unknown
1951 · Doctor (uncredited)
Space Patrol
1950
Kill or Be Killed
1950 · Gregory Marek
Act of Violence
1949 · German (voice) (uncredited)
Dangerous Millions
1946 · Rudolph Busch
Under Nevada Skies
1946 · Alberti
Escape in the Desert
1945 · Hoffman
Counter-Attack
1945 · Stillman
Watch on the Rhine
1943 · Oberdorff
Sherlock Holmes and the Secret Weapon
1942 · Braun (uncredited)
The Great Impersonation
1942 · Karl Hofmann
Junior Army
1942 · Horner - Nazi Saboteur (as Robert O. Davis)
The Devil with Hitler
1942 · Nazi Officer at Hitler's filmed Speech (uncredited)
Desperate Journey
1942 · Kruse
The Secret Code
1942 · Rudi Thysson
The Pied Piper
1942 · Lieutenant
Riders of the Northland
1942 · Agent (as Robert O. Davis)
The Phantom Plainsmen
1942 · Colonel Eric Hartwig (as Robert O. Davis)
Eagle Squadron
1942 · German Squad Leader
Spy Smasher
1942 · Col. Von Kohr
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