Menasor
The Transformers (1984)
Chairman
The Critical List (1978)
The Incredible Hulk (1977)
Logan's Run (1977)
The All-New Super Friends Hour (1977)
The Hardy Boys / Nancy Drew Mysteries (1977)
Quincy, M.E. (1976)
Judge
Dr. Lassiter
Rich Man, Poor Man - Book II (1976)
(voice)
The Scooby-Doo/Dynomutt Hour (1976)
The Bionic Woman (1976)
Professor Eidleman
Wonder Woman (1975)
Dr. Dane Cranston
Switch (1975)
Kolchak: The Night Stalker (1974)
Dr. Evan Stuart (as Regis J. Cordic)
The Rockford Files (1974)
The Manhunter (1974)
Host
The Six Million Dollar Man (1974)
Space Explorer
Toma (1973)
Kung Fu (1972)
The Streets of San Francisco (1972)
The Waltons (1972)
Emergency! (1972)
The Sixth Sense (1972)
Ambassador Reynolds
Monty Nash (1971)
Tyler
Nichols (1971)
Lewis
Columbo (1971)
Deputy Commissioner
Cannon (1971)
Doctor (as Regis J. Cordic)
Night Gallery (1970)
Famous Classic Tales (1970)
Marc Williams (as Regis J. Cordic)
The Mary Tyler Moore Show (1970)
McCloud (1970)
Medical Center (1969)
Chairman Walt
The Name of the Game (1968)
The Outsider (1968)
Mannix (1967)
Ironside (1967)
The Monkees (1966)
Moltar (voice)
Space Ghost and Dino Boy (1966)
Daniel Austin
The F.B.I. (1965)
El Superagent 86 (1965)
Reverend
Gunsmoke (1955)
Marshal Halstead
Sheriff Crane
Sheriff Grimes