 
			 
			| Movie | Horrible Horror | Colonel Karl Osler in 'She Demons' | 1986-01-01 | 
| Series | Garrison's Gorillas | Unknown | 1967-09-06 | 
| Movie | The Pigeon That Took Rome | Col. Wilhelm Krafft | 1962-06-19 | 
| Movie | On the Double | Oberkommandant | 1961-05-19 | 
| Movie | A Private's Affair | Dr. Leyden | 1959-08-14 | 
| Series | One Step Beyond | Unknown | 1959-01-20 | 
| Series | The Rebel | Unknown | 1959-10-04 | 
| Movie | Frankenstein 1970 | Wilhelm Gottfried | 1958-07-20 | 
| Series | 77 Sunset Strip | Unknown | 1958-10-10 | 
| Series | The Walter Winchell File | Unknown | 1957-10-02 | 
| Series | Alfred Hitchcock Presents | Unknown | 1955-10-02 | 
| Movie | Magnificent Obsession | Dr. Albert Fuss | 1954-08-07 | 
| Movie | King Richard and the Crusaders | Austrian Knight (uncredited) | 1954-08-07 | 
| Movie | Silver Needle in the Sky | Dr. Loran | 1954-05-29 | 
| Movie | The Snow Creature | Dr. Louis DuPont | 1954-11-01 | 
| Movie | A Star Is Born | Mr. Ettinger (uncredited) | 1954-10-01 | 
| Movie | Jungle Gents | Dr. Goebbel | 1954-09-05 | 
| Movie | South Sea Woman | Capt. van Dorck | 1953-06-27 | 
| Movie | Captain Scarface | Dr. Yeager | 1953-10-15 | 
| Series | Adventures of Superman | Unknown | 1952-09-19 | 
| Movie | Target Unknown | Doctor (uncredited) | 1951-02-08 | 
| Movie | Kill or Be Killed | Gregory Marek | 1950-04-30 | 
| Series | Space Patrol | 1950-12-30 | |
| Movie | Act of Violence | German (voice) (uncredited) | 1949-01-22 | 
| Movie | Under Nevada Skies | Alberti | 1946-08-26 | 
| Movie | Counter-Attack | Stillman | 1945-04-26 | 
| Movie | Escape in the Desert | Hoffman | 1945-05-01 | 
| Movie | Riders of the Northland | Agent (as Robert O. Davis) | 1942-06-18 | 
| Movie | The Phantom Plainsmen | Colonel Eric Hartwig (as Robert O. Davis) | 1942-06-16 | 
| Movie | Eagle Squadron | German Squad Leader | 1942-06-16 | 
| Movie | To Be or Not to Be | Gestapo Sergeant at Desk at Top of Hotel Stairs (uncredited) | 1942-03-06 | 
| Movie | Nazi Agent | Cab Driver (uncredited) | 1942-03-01 | 
| Movie | Spy Smasher | Col. Von Kohr | 1942-04-04 | 
| Movie | Desperate Journey | Kruse | 1942-09-26 | 
| Movie | Sherlock Holmes and the Secret Weapon | Braun (uncredited) | 1942-12-25 | 
| Movie | The Pied Piper | Lieutenant | 1942-08-21 | 
| Movie | The Great Impersonation | Karl Hofmann | 1942-12-18 | 
| Movie | Junior Army | Horner - Nazi Saboteur (as Robert O. Davis) | 1942-11-26 | 
| Movie | The Secret Code | Rudi Thysson | 1942-09-04 | 
| Movie | The Devil with Hitler | Nazi Officer at Hitler's filmed Speech (uncredited) | 1942-10-18 | 
| Movie | Mr. Dynamite | Frederick the Butler | 1941-03-01 | 
| Movie | Underground | Official | 1941-06-28 | 
| Movie | King of the Texas Rangers | His Excellency | 1941-10-03 | 
| Movie | Down in San Diego | Henry Schrode | 1941-08-01 | 
| Movie | A Dangerous Game | Dr. Fleming | 1941-08-21 | 
| Movie | The Man I Married | Storm Trooper | 1940-08-09 | 
| Movie | The Mortal Storm | Gestapo Official Hartman | 1940-06-20 | 
| Movie | Knute Rockne All American | Elder in Norway (uncredited) | 1940-10-05 | 
| Movie | The Great Dictator | Tomanian Commandant at Osterlich / Robert O. Davis | 1940-10-15 | 
| Movie | Arise, My Love | Prussian Officer (Uncredited) | 1940-11-08 | 
| Movie | Meet the Wildcat | Feral--Henchman | 1940-10-22 | 
| Movie | Confessions of a Nazi Spy | Captain Straubel | 1939-05-06 | 
| Movie | Espionage Agent | Paul Strawn (as Robert O. Davis) | 1939-09-30 | 
| Movie | Escape to Paradise | Alexander Komac | 1939-12-22 | 
| Movie | Pack Up Your Troubles | Von Richtman | 1939-10-24 | 
| Movie | That Mothers Might Live | Doctor (uncredited) | 1938-04-30 | 
| Movie | Champagne Waltz | Emperor Franz Joseph | 1937-02-05 | 
| Movie | We're in the Legion Now | Sgt. Groeber | 1936-12-13 | 
| Movie | Here's to Romance | Violinist | 1935-10-04 | 
| Movie | Rendezvous | Radio Operator (uncredited) | 1935-10-25 | 
| Movie | Last of the Pagans | Superintendant's Assistant (uncredited) | 1935-12-20 | 
| Movie | The Fountain | Geof Van Leyden | 1934-08-22 | 
| Movie | Hell in the Heavens | Lt. Schroeder (as Rudolph Amendt) | 1934-12-12 | 
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