Rudolph Anders

1967

Garrison's Gorillas

1966

Spy Smasher Returns

Col. Von Kahr

1963

The Prize

Mr. Rolfe Bergh - Chaperon

1963

Decision at Midnight

1962

Saints and Sinners

Otto Masuis

1962

The Pigeon That Took Rome

Col. Wilhelm Krafft

1961

On the Double

Oberkommandant

1959

The Rebel

Frank Gottwald

1959

A Private's Affair

Dr. Leyden

1959

One Step Beyond

Josef

1959

One Step Beyond

Dr. Heinrick Swansen

1958

77 Sunset Strip

1958

Frankenstein 1970

Wilhelm Gottfried

1958

She Demons

Col. Karl Osler

1957

The Walter Winchell File

1955

Alfred Hitchcock Presents

Cafe Host

1954

The Snow Creature

Dr. Louis DuPont

1954

A Star Is Born

Mr. Ettinger (uncredited)

1954

Jungle Gents

Dr. Goebbel

1954

Magnificent Obsession

Dr. Albert Fuss

1954

King Richard and the Crusaders

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

1952

Adventures of Superman

1952

Adventures of Superman

Dr. Rudolf Albrecht

1952

Dangerous Assignment

1951

Target Unknown

Doctor (uncredited)

1950

Space Patrol

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 and the Secret Weapon

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

To Be or Not to Be

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

The Great Dictator

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)