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