The Great Dictator
(Tomanian Commandant at Osterlich / Robert O. Davis)
The Prize
(Mr. Rolfe Bergh - Chaperon)
A Private's Affair
(Dr. Leyden)
Decision at Midnight
Magnificent Obsession
(Dr. Albert Fuss)
To Be or Not to Be
(Gestapo Sergeant at Desk at Top of Hotel Stairs (uncredited))
She Demons
(Col. Karl Osler)
Stamboul Quest
(Karl (as Rudolph Amendt))
Kill or Be Killed
(Gregory Marek)
Sherlock Holmes and the Secret Weapon
(Braun (uncredited))
Under Nevada Skies
(Alberti)
Counter-Attack
(Stillman)
King Richard and the Crusaders
(Austrian Knight (uncredited))
Rendezvous
(Radio Operator (uncredited))
Target Unknown
(Doctor (uncredited))
South Sea Woman
(Capt. van Dorck)
Spy Smasher Returns
(Col. Von Kahr)
Mr. Dynamite
(Frederick the Butler)
The Pigeon That Took Rome
(Col. Wilhelm Krafft)
The Phantom Plainsmen
(Colonel Eric Hartwig (as Robert O. Davis))
We're in the Legion Now
(Sgt. Groeber)
Spy Smasher
(Col. Von Kohr)
King of the Texas Rangers
(His Excellency)
The Secret Code
(Rudi Thysson)
Act of Violence
(German (voice) (uncredited))
Espionage Agent
(Paul Strawn (as Robert O. Davis))
The Fountain
(Geof Van Leyden)
The Pied Piper
(Lieutenant)
A Star Is Born
(Mr. Ettinger (uncredited))
Confessions of a Nazi Spy
(Captain Straubel)
That Mothers Might Live
(Doctor (uncredited))
Nazi Agent
(Cab Driver (uncredited))
Escape to Paradise
(Alexander Komac)
Pack Up Your Troubles
(Von Richtman)
Junior Army
(Horner - Nazi Saboteur (as Robert O. Davis))
Jungle Gents
(Dr. Goebbel)
Last of the Pagans
(Superintendant's Assistant (uncredited))
Here's to Romance
(Violinist)
The Mortal Storm
(Gestapo Official Hartman)
Arise, My Love
(Prussian Officer (Uncredited))
Knute Rockne All American
(Elder in Norway (uncredited))
The Man I Married
(Storm Trooper)
Champagne Waltz
(Emperor Franz Joseph)
Captain Scarface
(Dr. Yeager)
Riders of the Northland
(Agent (as Robert O. Davis))
The Snow Creature
(Dr. Louis DuPont)
Frankenstein 1970
(Wilhelm Gottfried)
Down in San Diego
(Henry Schrode)
Meet the Wildcat
(Feral--Henchman)
Underground
(Official)
A Dangerous Game
(Dr. Fleming)
Eagle Squadron
(German Squad Leader)
The Great Impersonation
(Karl Hofmann)
Phantom from Space
(Dr. Wyatt)
The Devil with Hitler
(Nazi Officer at Hitler's filmed Speech (uncredited))
Escape in the Desert
(Hoffman)
Desperate Journey
(Kruse)
The Mad Empress
(Herzfeld)
Silver Needle in the Sky
(Dr. Loran)
Dangerous Millions
(Rudolph Busch)
On the Double
(Oberkommandant)
Hell in the Heavens
(Lt. Schroeder (as Rudolph Amendt))
Garrison's Gorillas
77 Sunset Strip
Alfred Hitchcock Presents
(Cafe Host)
Saints and Sinners
(Otto Masuis)
One Step Beyond
(Josef)
Adventures of Superman
The Rebel
(Frank Gottwald)
The Walter Winchell File
Dangerous Assignment
Space Patrol
One Step Beyond
(Dr. Heinrick Swansen)
Adventures of Superman
(Dr. Rudolf Albrecht)