Donald O'Brien

Briganti: Amore e libertà
Barone
Film, 1994

Flight from Paradise
Film, 1990

Quest for the Mighty Sword
Gunther
Film, 1990

Mortacci
Archibald Williams
Film, 1989

Rosens navn
Pietro d'Assisi
Film, 1986

Queruak
Professor Olster
Film, 1986

I guerrieri dell'anno 2072
Monk
Film, 1984

The Panther Squad
General
Film, 1984

2020 Texas Gladiators
Black One
Film, 1982

Zombie Holocaust
Dr. Obrero / Dr. Butcher (US version)
Film, 1980

The Day Christ Died
Roman Soldier
Film, 1980

Æreløse slyngler
SS Officer
Film, 1978

Silver Saddle
Flertcher
Film, 1978

Emanuelle and the Last Cannibals
Donald McKenzie
Film, 1977

A Man Called Blade
Burt Craven
Film, 1977

Giant of the 20th Century
Sgt. Stricker
Film, 1977

Keoma
Caldwell
Film, 1976

Chaco - Banditten
Sheriff of Salt Flat
Film, 1975

Giochi erotici di una famiglia per bene
Professor Riccardo Rossi
Film, 1975

Challenge to White Fang
Liverpool
Film, 1974

Zanna Bianca alla riscossa
Caroll
Film, 1974

Sex of the Witch
Inspector
Film, 1973

The Executioner of God
Frank
Film, 1973

Sei bounty killers per una strage
Frank
Film, 1973

Two Brothers in Trinity
Lester O'Hara
Film, 1972

God Is My Colt .45
Collins (as Donal O'Brien)
Film, 1972

Finders Killers
Jack Forest
Film, 1971

Paid in Blood
Lee Rast
Film, 1971

Sheriff of Rock Springs
Burt Jones
Film, 1971

The Last Traitor
Captain Ned Carter
Film, 1971

Run, Man, Run
Daniel Cassidy
Film, 1968

Western, Italian Style
(as Donal O'Brien)
Film, 1968

Generalernes nat
Plotting German Officer
Film, 1967

Grand Prix
Wallace Bennett
Film, 1966

A Matter of Resistance
American Officer
Film, 1966

L'homme de l'Interpol
Film, 1966

Cloportes
Un visiteur de la galerie
Film, 1965

Operation Diplomatic Passport
Film, 1965

Nick Carter and Red Club
Film, 1965

Toget
Schwartz
Film, 1964

De l'assassinat considéré comme un des beaux-arts
Film, 1964

Weekend at Dunkirk
L'officier anglais
Film, 1964

Tales of Paris
Film, 1962

Dynamite Jack
Film, 1961

The Wretches
Film, 1960