 Peril from the Planet Mongo1966 · Writer | Writer |
 D-Day on Mars1966 · Screenplay | Screenplay |
| SSakima and the Masked Marvel1966 · Screenplay | Screenplay |
 Purple Death from Outer Space1966 · Writer | Writer |
 Spaceship to the Unknown1966 · Writer | Writer |
 Savage Fury1956 · Writer | Writer |
 Lawless Code1949 · Screenplay | Screenplay |
 Brand of Fear1949 · Screenplay | Screenplay |
 The Phantom Creeps1949 · Screenplay | Screenplay |
 Gun Law Justice1949 · Screenplay | Screenplay |
 Federal Agents vs. Underworld, Inc.1949 · Screenplay | Screenplay |
 Adventures of Frank and Jesse James1948 · Screenplay | Screenplay |
 The Rangers Ride1948 · Screenplay | Screenplay |
 G-Men Never Forget1948 · Screenplay | Screenplay |
 Dangers of the Canadian Mounted1948 · Screenplay | Screenplay |
 Jesse James Rides Again1947 · Screenplay | Screenplay |
 Son of Zorro1947 · Screenplay | Screenplay |
 The Crimson Ghost1946 · Screenplay | Screenplay |
 Daughter of Don Q1946 · Screenplay | Screenplay |
 King of the Forest Rangers1946 · Screenplay | Screenplay |
 The Phantom Rider1946 · Screenplay | Screenplay |
 The Purple Monster Strikes1945 · Screenplay | Screenplay |
 Federal Operator 991945 · Screenplay | Screenplay |
 Manhunt of Mystery Island1945 · Screenplay | Screenplay |
 Zorro's Black Whip1944 · Screenplay | Screenplay |
 Haunted Harbor1944 · Screenplay | Screenplay |
 Captain America1944 · Screenplay | Screenplay |
 The Masked Marvel1943 · Screenplay | Screenplay |
 Secret Service In Darkest Africa1943 · Writer | Writer |
 Daredevils of the West1943 · Screenplay | Screenplay |
 The Secret Code1942 · Screenplay | Screenplay |
 Perils of the Royal Mounted1942 · Screenplay | Screenplay |
 Holt of the Secret Service1941 · Screenplay | Screenplay |
 The Iron Claw1941 · Screenplay | Screenplay |
 Riders of Death Valley1941 · Screenplay | Screenplay |
 The Green Hornet Strikes Again!1940 · Screenplay | Screenplay |
 Junior G-Men1940 · Writer | Writer |
 Dead End Kids vs. Spies, Inc.1940 · Writer | Writer |
 Winners of the West1940 · Screenplay | Screenplay |
 Flash Gordon Conquers the Universe1940 · Screenplay | Screenplay |
 The Green Hornet1940 · Screenplay | Screenplay |
 Mandrake the Magician1940 · Screenplay | Screenplay |
 Trigger Fingers1939 · Screenplay | Screenplay |
 Straight Shooter1939 · Screenplay | Screenplay |
 The Oregon Trail1939 · Screenplay | Screenplay |
 Mandrake the Magician1939 · Screenplay | Screenplay |
 Outlaws' Paradise1939 · Screenplay | Screenplay |
 Flying G-Men1939 · Screenplay | Screenplay |
 Scouts to the Rescue1939 · Screenplay | Screenplay |
 The Phantom Creeps1939 · Screenplay | Screenplay |
 The Spider's Web1938 · Screenplay | Screenplay |
 Flaming Frontiers1938 · Screenplay | Screenplay |
 Rocket Ship1938 · Screenplay | Screenplay |
 Amateur Crook1937 · Screenplay | Screenplay |
 Sky Racket1937 · Screenplay | Screenplay |
 Million Dollar Racket1937 · Screenplay | Screenplay |
 Lost Ranch1937 · Screenplay | Screenplay |
 Flying Fists1937 · Screenplay | Screenplay |
 Orphan of the Pecos1937 · Writer | Writer |
 Mystery Range1937 · Screenplay | Screenplay |
 The Feud of the Trail1937 · Screenplay | Screenplay |
 Cheyenne Rides Again1937 · Screenplay | Screenplay |
 Blake of Scotland Yard1937 · Screenplay | Screenplay |
| Blake of Scotland Yard1937 · Screenplay | Screenplay |
 The Phantom of the Range1936 · Screenplay | Screenplay |
 Law and Lead1936 · Screenplay | Screenplay |
 The Phantom Rider1936 · Screenplay | Screenplay |
 Flash Gordon1936 · Screenplay | Screenplay |
 The Roaring West1935 · Writer | Writer |
 The New Adventures of Tarzan1935 · Screenplay | Screenplay |
 The Call of the Savage1935 · Writer | Writer |
 Rustlers of Red Dog1935 · Screenplay | Screenplay |
 The Red Rider1934 · Screenplay | Screenplay |
 The Vanishing Shadow1934 · Screenplay | Screenplay |
 Pirate Treasure1934 · Screenplay | Screenplay |
 Perils of Pauline1933 · Screenplay | Screenplay |
 Tarzan the Fearless1933 · Writer | Writer |
 The Phantom of the Air1933 · Screenplay | Screenplay |
 Clancy of the Mounted1933 · Writer | Writer |
 The Secrets of Wu Sin1932 · Writer | Writer |
 Jungle Mystery1932 · Screenplay | Screenplay |
 Danger Island1931 · Screenplay | Screenplay |
| HHeroes of the Flames1931 · Screenplay | Screenplay |
 The Ridin' Demon1929 · Writer | Writer |
 Guardians of the Wild1928 · Writer | Writer |
| QQuick Triggers1928 · Writer | Writer |
| AA Final Reckoning1928 · Screenplay | Screenplay |
 Thunder Riders1928 · Screenplay | Screenplay |
 The Fearless Rider1928 · Writer | Writer |
 Wolf's Trail1927 · Screenplay | Screenplay |
 The Border Cavalier1927 · Screenplay | Screenplay |
 The Frontier Trail1926 · Screenplay | Screenplay |
 In Search of a Thrill1923 · Screenplay | Screenplay |
 Welcome to Our City1922 · Writer | Writer |
 The Right Way1921 · Writer | Writer |
 Beatrice Fairfax1916 · Screenplay | Screenplay |
 The Romance of Elaine1915 · Writer | Writer |
 The New Exploits of Elaine1915 · Writer | Writer |
 The Exploits of Elaine1914 · Screenplay | Screenplay |
 The Perils of Pauline1914 · Writer | Writer |
