Peter Mark Richman
- After the Wizard
2011 Charles Samuel Williams
- Mysteria
2011 Senator Mitchell
- The Desperate
2009 Dr. Blumenthal
- Vic
2006 Paul Marcus
- Poolhall Junkies
2002 Phillip
- 4 Faces
2001 Writer
- Batman Beyond
1999 Winchell (voice)
- Superman: The Animated Series
1996 Abin Sur / Guardian #1 (voice)
- Spider-Man
1994 Old Peter Parker / Old Spider-Man (voice)
- SWAT Kats: The Radical Squadron
1993 Tabor (voice)
- Batman: The Animated Series
1992 Charles Baxter (voice)
- The Naked Gun 2½: The Smell of Fear
1991 Dunwell
- Beverly Hills, 90210
1990 Lawrence Carson
- Friday the 13th Part VIII: Jason Takes Manhattan
1989 Charles McCulloch
- Judgement Day
1988 Priest
- Bonanza: The Next Generation
1988 Mr. Dunson
- Supercarrier
1988
- Star Trek: The Next Generation
1987 Ralph Offenhouse
- Defenders of the Earth
1986 The Phantom / Kit Walker / 26th Phantom (voice)
- Matlock
1986 Adam Whitley
- City Killer
1984 Lieutenant Walling
- Murder, She Wrote
1984 Lamar Bennett
- Crazy like a Fox
1984 Dr. Donald Rafelman
- Finder of Lost Loves
1984 Frank Cunningham
- Santa Barbara
1984 C.C. Capwell
- Dempsey
1983 Tex Rickard
- Hardcastle and McCormick
1983 Roy Barlow
- T. J. Hooker
1982 Russ Paterno
- Knight Rider
1982 Dr. Klaus Bergstrom
- Hotel
1982 Dr. David Lyman
- Dynasty
1981 Andrew Laird
- Conquest of the Earth
1980 Col. Briggs
- PSI Factor
1980 Edgar Hamilton
- Galactica 1980
1980 Colonel Briggs
- In Search of Historic Jesus
1979 God (voice)
- B. J. and the Bear
1979 Mr. Denby
- 240-Robert
1979 Marcus
- Blind Ambition
1979 Robert Mardian
- Hart to Hart
1979 Arthur Horton
- The Islander
1978 Lt. Larkin
- Dallas
1978 Maynard Anderson
- Vega$
1978 Grady
- Sword of Justice
1978 Howard Thaler
- Greatest Heroes of the Bible
1978 King Bera
- Fantasy Island
1978 Roy Burke
- Three's Company
1977 Reverend Snow
- Dog and Cat
1977 Massler
- The Incredible Hulk
1977 Ellis Jordan
- The Love Boat
1977 Frank Patton
- Mallory: Circumstantial Evidence
1976 John Shields
- The Bionic Woman
1976 Col. Dubnov
- Quincy, M.E.
1976 Walter Kingman
- Charlie's Angels
1976 Ken Atamien
- Baretta
1975 Simon Abbott
- Wonder Woman
1975 Dr. Crippin
- Switch
1975 Saunders
- Starsky & Hutch
1975 Avery Schiller
- Medical Story
1975 Dr. Ronald Calley
- Nightmare at 43 Hillcrest
1974 Clarence Hartog
- Get Christie Love!
1974 Young
- The Six Million Dollar Man
1974 Dr. Walter Ellis
- Petrocelli
1974 Leo Roman
- Hawkins
1973 Paul Forbes
- Barnaby Jones
1973 Richard Stayman
- Police Story
1973 Abbott
- The Streets of San Francisco
1972 Lt. Vincent Bondini
- Search
1972 Samuel Boyce
- Banacek
1972 Andy Cole
- Yuma
1971 Maj. Lucas
- Longstreet
1971 Duke Paige
- Cannon
1971 Col. Roy Haggard
- House on Greenapple Road
1970 Sal Gilman
- McCloud
1970 Peter B. Clifford
- The Silent Force
1970 Walter Garland
- Hawaii Five-O
1969 Nick Morgan
- My Friend Tony
1969
- Marcus Welby, M.D.
1969 Arthur Kolinski
- How to Steal the World
1968 Mr. Webb
- For Singles Only
1968 Gerald Pryor
- Land of the Giants
1968 Dr. Marad
- Lancer
1968 Carl Bolton
- The Name of the Game
1968 Latimer
- It Takes a Thief
1968 Anton Veitch
- Ironside
1967 Daryll Frazer
- The Invaders
1967 Tom Wiley
- Mannix
1967 Martin Emory
- Agent for H.A.R.M.
1966 Adam Chance
- Mission: Impossible
1966 Gen. Stefano Aragas
- Felony Squad
1966 Emmett Koster
- Jericho
1966 Maj. Otto Von Zeeny
- Blue Light
1966 Dr. Kurt Von Stafenberg
- T.H.E. Cat
1966 Miguel Figueroa
- Dark Intruder
1965 Robert Vandenburg
- The F.B.I.
1965 Maury Maddock
- The Wild Wild West
1965 Prince Gio
- The Loner
1965 Conway
- Seaway
1965 Smith
- Daniel Boone
1964 Hawk
- Profiles in Courage
1964 Rawlins
- 12 O'Clock High
1964 Col. Kendal Hunter
- The Man from U.N.C.L.E.
1964 Webb
- Voyage to the Bottom of the Sea
1964 Gantt
- The Fugitive
1963 Johnny
- The Outer Limits
1963 Prof. Ian Fraser
- Combat!
1962 Capt. Aptmeyer
- The Virginian
1962 Johnny Madrid
- Stoney Burke
1962 Redmond
- The Crimebusters
1961 Nicholas Cain
- The Murder Men
1961 Nick Cain
- Cain's Hundred
1961 Nicholas 'Nick' Cain
- Ben Casey
1961 Dr. Henry Pryor
- The Black Orchid
1959 Noble
- The Twilight Zone
1959 Robert Franklin
- Rawhide
1959 Lloyd Mastic
- The DuPont Show with June Allyson
1959 David
- Bonanza
1959 Richard Vardeman
- Girls on the Loose
1958 Police Lt. Bill Hanley
- The Strange One
1957 Cadet Colonel Corger (as Mark Richman)
- Friendly Persuasion
1956 Gardner 'Gard' Jordan
- Dick Powell's Zane Grey Theatre
1956 Gar Durand
- Gunsmoke
1955 Norm Trainer
- Alfred Hitchcock Presents
1955 Officer Barrett
- Playwrights '56
1955 Jim
- Middle of the Night
1954 Jack
- Studio 57
1954
- Schlitz Playhouse of Stars
1951 Bat La Rue
- Suspense
1949 Young Officer
- Studio One
1948 Price
- Kraft Television Theatre
1947 Mack
