1999Battlestar Galactica: The Second Coming— Commander Adama (archive footage)
1987The Alamo: Thirteen Days to Glory— Gen. Sam Houston
1986Vasectomy: A Delicate Matter— Theo
1986Noah's Ark— Noah (voice)
1986The Canadian Conspiracy— Self
1984The Nutcracker: A Fantasy on Ice— Self - Narrator
1982Heidi's Song— Grandfather (voice)
1980Conquest of the Earth— Cmdr. Adama
1980Klondike Fever— Inspector Sam Steele
1980A Time for Miracles— Bishop John Carroll
1979Mission Galactica: The Cylon Attack— Cmdr. Adama
1979A Walking Tour of Sesame Street— Ben Cartwright (archive footage) (uncredited)
1978Battlestar Galactica— Cmdr. Adama
1978The Case of the Baltimore Girls— Wade Griffin
1978SST: Death Flight— Marshall Cole
1978The Little Brown Burro— Storyteller (voice)
1977Yabba Dabba Doo! The Happy World of Hanna-Barbera— Self
1975Man on the Outside— Wade Griffin
1975Wings in the Wilderness— Self
1975High Country Calling
1975Nevada Smith— Jonas Cord
1975Tidal Wave— Ambassador Warren Richards
1974Earthquake— Sam Royce
1974Rex Harrison Presents Stories of Love— Hercule
1974Sandy in Disneyland— Self
1973Grierson— Self
1972Death Follows a Psycho
1972The Special London Bridge Special— Fiddler on the Roof
1972The Legend of Amaluk: An Arctic Journey— Narrator
1971The Harness— Peter Randall
1970A Place in History— Narrator
1970The Gifts— Narrator
1970A Man for Loving— James Beal
1970Swing Out, Sweet Land— George Washington
1969Destiny of a Spy— Peter Vanin
1968A Way Out of the Wilderness— Narrator
1968The Dean Martin Christmas Show— Self (uncredited)
1968Rowan & Martin at the Movies— Self
1966Christmas with Lorne Greene
1966Ride the Wind— Ben Cartwright
1962The New March of Dimes Presents: The Scene Stealers— Self
1959The Trap— Davis
1959The Hangman— Clem J. Cummings
1958The Buccaneer— Mercier
1958The Last of the Fast Guns— Michael O'Reilly
1958The Gift of Love— Grant Allan
1957Peyton Aşıkları— District Attorney
1957The Hard Man— Rice Martin
1957The Edge of Innocence— Lowell Williams
1957Mayerling— Emperor's Aide
1956Autumn Leaves— Mr. Hanson
1954The Silver Chalice— Peter
1953Social-Sex Attitudes in Adolescence— narrator
1953Farewell Oak Street— Narrator
1953Age of Turmoil— Narrator
1953Meaning of Adolescence— Narrator
19531984— O'Brien
1951Eye Witness No. 33— Self - Narrator (voice)
1950The Cliff Hangers— Self - Narration (voice)
1950Date of Birth— Narration (voice)
1949White Fortress— Self - Narrator
1949A Capital Plan— Narrator
1948What's on Your Mind— Narrator
1947Johnny at the Fair
1947Tomorrow's Citizens— Narrator
1945Ordeal by Ice— Narrator (voice)
1945Now—The Peace— Narrator (uncredited)
1945Gateway to Asia— Narrator (voice)
1945Suffer Little Children— Himself - Narrator
1945Headline Hunters— Narrator (voice)
1945The War Is Over— Narrator
1944Global Air Routes— Narrator (voice)
1944Look to the North— Narrator (voice)
1944Our Northern Neighbour— Narrator (voice)
1944Break-through— Himself - Narrator
1944Fighting Sea-Fleas— Narrator (voice)
1944Train Busters— Narrator (voice)
1944Trans-Canada Express— Narrator (voice)
1944Pincers on Japan— Narrator
1944Wounded in Action— Narrator (voice)
1943Fighting Norway— Narrator (voice)
1942The Mask of Nippon— Narrator (voice)
1942The Battle for Oil— Narrator
1942Inside Fighting China— Narrator
1941Warclouds in the Pacific— Narrator (voice)
1941Battle of Brains— Narrator (voice)
1941Churchill's Island— Narrator (voice)
1941Heroes of the Atlantic— Narrator (voice)
1940Wings of Youth— Narrator (voice)
1940Front of Steel— Narrator
1940Home Front— Narrator
1940Atlantic Patrol— Narrator
1940Children from Overseas— Narrator
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