Credits

• 1987 · The Alamo: Thirteen Days to Glory as Gen. Sam Houston
• 1986 · The Canadian Conspiracy as
• 1986 · Vasectomy: A Delicate Matter as Theo
• 1986 · Noah's Ark as Noah (voice)
• 1984 · The Nutcracker: A Fantasy on Ice as
• 1984 · Highway to Heaven as Fred Fusco
• 1983 · Reading Rainbow as Himself - Narrator (voice)
• 1982 · Heidi's Song as Grandfather (voice)
• 1982 · Lorne Greene's New Wilderness as Narrator
• 1982 · Police Squad! as Stabbed Man
• 1981 · Code Red as Battalion Chief Joe Rorchek
• 1981 · Aloha Paradise as
• 1980 · Conquest of the Earth as Adama
• 1980 · A Time for Miracles as Bishop John Carroll
• 1980 · The Alan Thicke Show as
• 1980 · Siegfried and Roy - Superstars Of Magic as
• 1980 · Galactica 1980 as Commander Adama
• 1980 · Klondike Fever as Inspector Sam Steele
• 1979 · Mission Galactica: The Cylon Attack as Cmdr. Adama
• 1979 · A Walking Tour of Sesame Street as Ben Cartwright (archive footage) (uncredited)
• 1978 · The Little Brown Burro as Storyteller (voice)
• 1978 · Vega$ as
• 1978 · Battlestar Galactica as Commander Adama
• 1978 · Battlestar Galactica as Commander Adama
• 1978 · The Bastard as Bishop Francis
• 1978 · The Case of the Baltimore Girls as Wade Griffin
• 1977 · Yabba Dabba Doo! The Happy World of Hanna-Barbera as Self
• 1977 · The Trial of Lee Harvey Oswald as Matthew Arnold Watson
• 1977 · The Love Boat as Buck Hamilton
• 1977 · SST: Death Flight as Marshall Cole
• 1977 · The Hardy Boys / Nancy Drew Mysteries as
• 1977 · Roots as
• 1977 · Roots as John Reynolds
• 1976 · Arthur Hailey's The Moneychangers as George Quartermain
• 1976 · Donny & Marie as Self
• 1975 · Man on the Outside as Wade Griffin
• 1975 · Nevada Smith as Jonas Cord
• 1975 · Wings in the Wilderness as Self
• 1975 · High Country Calling as
• 1974 · Earthquake as Sam Royce
• 1974 · Rex Harrison Presents Stories of Love as Hercule
• 1973 · Griff as
• 1973 · The Dean Martin Celebrity Roasts as Self
• 1972 · To the Wild Country as Host
• 1972 · The Legend of Amaluk: An Arctic Journey as Narrator
• 1972 · Death Follows a Psycho as
• 1972 · The Special London Bridge Special as Fiddler on the Roof
• 1971 · Appointment With Destiny as Narrator
• 1971 · The Harness as Peter Randall
• 1971 · V.I.P. Schaukel as Self
• 1971 · The Pet Set as Self
• 1970 · A Place in History as Narrator
• 1970 · A Man for Loving as James Beal
• 1970 · The Gifts as Narrator
• 1969 · Destiny of a Spy as Peter Vanin
• 1969 · The Johnny Cash Show as Self
• 1968 · The Dean Martin Christmas Show as Self (uncredited)
• 1968 · A Way Out of the Wilderness as Narrator
• 1968 · Rowan & Martin at the Movies as Self
• 1967 · Rowan & Martin's Laugh-In as Self
• 1966 · Christmas with Lorne Greene as
• 1966 · Goldene Kamera Verleihung as Self
• 1966 · Bonanza: Ride the Wind as Ben Cartwright
• 1965 · The Dean Martin Show as
• 1964 · Die Drehscheibe as Self
• 1962 · The Merv Griffin Show as Self
• 1962 · The Tonight Show Starring Johnny Carson as Self - Guest Host
• 1962 · The Tonight Show Starring Johnny Carson as Self
• 1962 · The New March of Dimes Presents: The Scene Stealers as Self
• 1959 · The Third Man as
• 1959 · Bonanza as Ben Cartwright
• 1959 · The Hangman as Clem J. Cummings
• 1959 · The Trap as Davis
• 1958 · The Buccaneer as Mercier
• 1958 · Kraft Music Hall as Self - Host
• 1958 · Bronco as
• 1958 · The Last of the Fast Guns as Michael O'Reilly
• 1958 · The Gift of Love as Grant Allan
• 1957 · Peyton Place as District Attorney
• 1957 · The Hard Man as Rice Martin
• 1957 · The Edge of Innocence as Lowell Williams
• 1957 · Suspicion as Monty
• 1957 · Mayerling as Emperor's Aide
• 1956 · Autumn Leaves as Mr. Hanson
• 1955 · Alfred Hitchcock Presents as Mr. X
• 1955 · Folio as Beethoven
• 1955 · Folio as Patiomkin
• 1955 · Cheyenne as
• 1955 · Cheyenne as Colonel Bell
• 1955 · Tight Spot as Benjamin Costain
• 1954 · The Silver Chalice as Peter
• 1954 · Climax! as Dr. Charles Saunders
• 1953 · Social-Sex Attitudes in Adolescence as narrator
• 1953 · 1984 as O'Brien
• 1953 · Farewell Oak Street as Narrator
• 1953 · Age of Turmoil as Narrator
• 1953 · Meaning Of Adolescence as Narrator
• 1952 · Omnibus as
• 1951 · Eye Witness No. 33 as Self - Narrator (voice)
• 1950 · The Cliff Hangers as Self - Narration (voice)
• 1950 · Date of Birth as Narration (voice)
• 1949 · White Fortress as Self - Narrator
• 1949 · A Capital Plan as Narrator
• 1948 · What's on Your Mind as Narrator
• 1948 · Macy's Thanksgiving Day Parade as
• 1948 · Studio One as Minister of Truth O'Brien
• 1948 · Studio One as Minister of the Interior
• 1948 · Studio One as Alexander Ferrando
• 1948 · Studio One as Frank Leslie
• 1948 · Studio One as Dr. Madison West
• 1948 · Bambi Awards as Self
• 1947 · Johnny at the Fair as
• 1947 · Tomorrow's Citizens as Narrator
• 1945 · Headline Hunters as Narrator (voice)
• 1945 · Gateway to Asia as Narrator (voice)
• 1945 · Suffer Little Children as Himself - Narrator
• 1945 · The War Is Over as Narrator
• 1945 · Now—The Peace as Narrator (uncredited)
• 1945 · Ordeal by Ice as Narrator (voice)
• 1944 · Global Air Routes as Narrator (voice)
• 1944 · Look to the North as Narrator (voice)
• 1944 · Our Northern Neighbour as Narrator (voice)
• 1944 · Trans-Canada Express as Narrator (voice)
• 1944 · Train Busters as Narrator (voice)
• 1944 · Break-through as Himself - Narrator
• 1944 · Fighting Sea-Fleas as Narrator (voice)
• 1944 · Golden Globe Awards as Self - Presenter
• 1943 · Fighting Norway as Narrator (voice)
• 1942 · The Mask of Nippon as Narrator (voice)
• 1941 · Warclouds in the Pacific as Narrator (voice)
• 1941 · Heroes of the Atlantic as Narrator (voice)
• 1941 · Battle of Brains as Narrator (voice)
• 1941 · Churchill's Island as Narrator (voice)
• 1940 · Wings of Youth as Narrator (voice)
• 1940 · Children from Overseas as Narrator
• 1940 · Front of Steel as Narrator
• 1940 · Home Front as Narrator
• 1940 · Atlantic Patrol as Narrator
• 2024 · Aldo Leopold 1: His Life and Thought as
• 2024 · Aldo Leopold 2: A Sand County Almanac as
• 2024 · The Glen Campbell Goodtime Hour: Christmas Special (December 20, 1970) as self