Fotoğrafları
1966
Spy Smasher Returns
Col. Von Kahr
1963
The Prize
Mr. Rolfe Bergh - Chaperon
1963
Decision at Midnight
1962
The Pigeon That Took Rome
Col. Wilhelm Krafft
1961
On the Double
Oberkommandant
1959
A Private's Affair
Dr. Leyden
1958
Frankenstein 1970
Wilhelm Gottfried
1958
She Demons
Col. Karl Osler
1954
The Snow Creature
Dr. Louis DuPont
1954
Bir Yıldız Doğuyor
Mr. Ettinger (uncredited)
1954
Jungle Gents
Dr. Goebbel
1954
Mukaddes Azap
Dr. Albert Fuss
1954
Aslan Yürekli Richard
Austrian Knight (uncredited)
1954
Silver Needle in the Sky
Dr. Loran
1953
Captain Scarface
Dr. Yeager
1953
South Sea Woman
Capt. van Dorck
1953
Phantom from Space
Dr. Wyatt
1951
Target Unknown
Doctor (uncredited)
1950
Kill or Be Killed
Gregory Marek
1949
Act of Violence
German (voice) (uncredited)
1946
Dangerous Millions
Rudolph Busch
1946
Under Nevada Skies
Alberti
1945
Escape in the Desert
Hoffman
1945
Counter-Attack
Stillman
1942
Sherlock Holmes ve Gizli Silah
Braun (uncredited)
1942
The Great Impersonation
Karl Hofmann
1942
Junior Army
Horner - Nazi Saboteur (as Robert O. Davis)
1942
The Devil with Hitler
Nazi Officer at Hitler's filmed Speech (uncredited)
1942
Desperate Journey
Kruse
1942
The Secret Code
Rudi Thysson
1942
The Pied Piper
Lieutenant
1942
Riders of the Northland
Agent (as Robert O. Davis)
1942
The Phantom Plainsmen
Colonel Eric Hartwig (as Robert O. Davis)
1942
Eagle Squadron
German Squad Leader
1942
Spy Smasher
Col. Von Kohr
1942
Olmak ya da Olmamak
Gestapo Sergeant at Desk at Top of Hotel Stairs (uncredited)
1942
Nazi Agent
Cab Driver (uncredited)
1941
King of the Texas Rangers
His Excellency
1941
A Dangerous Game
Dr. Fleming
1941
Down in San Diego
Henry Schrode
1941
Underground
Official
1941
Mr. Dynamite
Frederick the Butler
1940
Arise, My Love
Prussian Officer (Uncredited)
1940
Meet the Wildcat
Feral--Henchman
1940
Büyük Diktatör
Tomanian Commandant at Osterlich / Robert O. Davis
1940
Knute Rockne All American
Elder in Norway (uncredited)
1940
The Man I Married
Storm Trooper
1940
The Mortal Storm
Gestapo Official Hartman
1939
Escape to Paradise
Alexander Komac
1939
The Mad Empress
Herzfeld
1939
Pack Up Your Troubles
Von Richtman
1939
Espionage Agent
Paul Strawn (as Robert O. Davis)
1939
Confessions of a Nazi Spy
Captain Straubel
1938
That Mothers Might Live
Doctor (uncredited)
1937
Champagne Waltz
Emperor Franz Joseph
1936
We're in the Legion Now
Sgt. Groeber
1935
Last of the Pagans
Superintendant's Assistant (uncredited)
1935
Rendezvous
Radio Operator (uncredited)
1935
Here's to Romance
Violinist
1934
Hell in the Heavens
Lt. Schroeder (as Rudolph Amendt)
1934
The Fountain
Geof Van Leyden
1934
Stamboul Quest
Karl (as Rudolph Amendt)