Professor (uncredited)
Crossroads (1942)
Simkins
Haunted House (1940)
Doc Hunter
On the Spot (1940)
Joseph Manners
Rocky Mountain Rangers (1940)
Minor Role (uncredited)
Abe Lincoln in Illinois (1940)
Davis
They Shall Have Music (1939)
Superintendent Keene
Boys' Reformatory (1939)
Carl Roemer
Mr. Wong, Detective (1938)
Townsman
The Mysterious Rider (1938)
Pat Doyle
Phantom Ranger (1938)
Roger Morton
International Crime (1938)
Crane
Saleslady (1938)
Caleb Delthern
The Shadow Strikes (1937)
Chandler Elliott
Jungle Menace (1937)
Coxon
Paradise Isle (1937)
Doctor
Borderland (1937)
Mr. Abrams
Below the Deadline (1936)
Sheriff Sam Corwin
Three on the Trail (1936)
Jim
Call of the Prairie (1936)
Dr. Munro
The Dark Hour (1936)
Opera Conductor (uncredited)
A Night at the Opera (1935)
Jerome T. Shelby
The Lady in Scarlet (1935)
Prof. Trowbridge
Death from a Distance (1935)
Attorney General Davis (uncredited)
The President Vanishes (1934)
Defense attorney
Guilty Parents (1934)
John J. Martin
Notorious But Nice (1933)
Governor
King of the Arena (1933)
Grover Cromwell
The World Gone Mad (1933)
Colonel Charles Ormsby
Terror Trail (1933)
Banker (uncredited)
The Match King (1932)
Doctor Consoling Nasa (Uncredited)
Call Her Savage (1932)
John Tracy
The Gambling Sex (1932)
Glidden Associate (uncredited)
If I Had a Million (1932)
Dr. McDonald
False Faces (1932)
Robert Henley
The Crusader (1932)
Dr. Schifflen
Symphony of Six Million (1932)
John Nichols
Lena Rivers (1932)
Dr. Niergardt
Alias the Doctor (1932)
U.S. Ambassador
Heartbreak (1931)
Passport Official at Airport
The Yellow Ticket (1931)
General
The Gay Diplomat (1931)
Hotel Manager
Their Mad Moment (1931)
Serafin, Arturo's Butler
Transgression (1931)
Madeleine's Father
Men of the Sky (1931)
Dr. Mark Wyndram
Doctors' Wives (1931)
Judge Advocate (as John M. St. Polis)
Beau Ideal (1931)
Dr. Rinewulf
The Criminal Code (1931)
Pedro
Captain Thunder (1930)
The Imam Mahmud
Kismet (1930)
Don Diego
A Devil with Women (1930)
Judge
The Bad One (1930)
The Three Sisters (1930)
Philip Vantine
In the Next Room (1930)
Von Kemper
The Melody Man (1930)
John Rountree
Party Girl (1930)
Andrew Stratton
Fast Life (1929)
Dr. John M. Besant
Coquette (1929)
Pa Kelly
Why Be Good? (1929)
Defense Attorney
The Power of Silence (1928)
Mouvet
A Woman's Way (1928)
Surgeon (uncredited)
The Unknown (1927)
Erastus Mason
Too Many Crooks (1927)
Comte de Maigny
The Lily (1926)
Prof. Leopold Eberhardt (as John Sainpolis)
The Greater Glory (1926)
Comte Philip de Chagny
The Phantom of the Opera (1925)
Mark Kelsey (as John Sainpolis)
Paint and Powder (1925)
Inspector
My Lady's Lips (1925)
Ridgeway (modern sequence)
Folly of Vanity (1925)
Dexter
The Dixie Handicap (1924)
André du Vallois
The Rose of Paris (1924)
Rossland (as John Sainpolis)
The Alaskan (1924)
Monahan
Those Who Dance (1924)
Colonel de Gontran (Prologue)
Mademoiselle Midnight (1924)
The King
Three Weeks (1924)
Hiram Burbeck
Held to Answer (1923)
Milo Bleech (as John Sainpolis)
Woman-Proof (1923)
The Social Code (1923)
Dr. Copin
The Untameable (1923)
John Crawshay
Three Wise Fools (1923)
Self - Celebrity Actor in Commissary
Souls for Sale (1923)
Nate Snow
Shadows (1922)
Skinner (as John Sainpolis)
Cappy Ricks (1921)
Etienne Laurier
The Four Horsemen of the Apocalypse (1921)
Jean Paurel
The Great Lover (1920)
Kaiser
Stake Uncle Sam to Play Your Hand (1918)
Black Jack Burg
Laughing Bill Hyde (1918)
Sam Tupper
All Woman (1918)
David Moulton
The Public Defender (1917)
Harvey Brooks
The Love That Lives (1917)
Clavering
The Mystic Hour (1917)
Dejoie
Sapho (1917)
Duvernet
The Fortunes of Fifi (1917)
The Salamander (1916)
Wormwood (1915)
Joseph and His Coat of Many Colors (1914)