Royal Canadian Corps of Signals, 1956 (writer)
Canada’s Armed Forces, 1957 (writer)
Canadian Infantrymen, 1958 (writer)
A Matter of Survival, 1958 (writer)
Sight Unseen, 1958 (director; writer)
Setting Fires for Science, 1958 (director; writer)
St. Lawrence Burns, No. 1
–8, 1958 (director)
Winter Construction? It Can Be Done, 1958 (director; writer)
A Day in the Night of Jonathan Mole, 1959 (director; writer)
Everybody's Prejudiced, 1961 (director; writer)
Canada at War series, 1962 (director; writer)
Willie Catches On, 1962 (writer)
Fields of Sacrifice, 1963 (director; writer; producer)
Bethune, 1964 (director; writer; producer)
The Campaigners, 1964 (director; writer)
The Changing City, 1964 (writer)
Return Reservation, 1964 (director; writer)
Summerhill, 1964 (director; writer; producer)
Buster Keaton Rides Again, 1965 (writer)
Ladies and Gentlemen... Mr. Leonard Cohen, 1965 (co-director with Don Owen; writer)
Memorandum, 1965 (co-director with John Spotton; writer)
Stravinsky, 1965 (writer)
A Trip Down Memory Lane, 1965 (producer)
Helicopter Canada, 1966 (writer)
Never a Backward Step, 1966 (co-director with John Spotton, Arthur Hammond)
What On Earth!, 1966 (writer)
Juggernaut, 1967 (writer)
Labyrinth, 1967 (writer)
To Be Young, 1967 (writer)
Saul Alinsky Went to War, 1968 (co-director with Peter Pearson; writer)
A Message to the Twenty-First Century, 1970 (director)
Tiger Child, 1970 (co-director with Roman Kroitor, Kiichi Ichikawa; writer)
World of Enrico Fermi, 1970 (writer)
The Apprentice, 1971 (producer)
The Noblest of Callings... The Vilest of Trades, 1971 (co-director with Ralph L. Thomas; writer; TV)
The One Man Band that Went to Wall Street, 1972 (writer)
The People’s Railway, 1972 (writer; producer)
Catskinner Keen, 1973 (director; writer; producer)
Cavendish Country, 1974 (director; writer; producer)
Grierson, 1973 (writer)
Starblanket, 1973 (director; writer; producer)
Dreamland: A History of Early Canadian Movies 1895-1939, 1974 (director; writer)
King of the Hill, 1974 (co-director with Martin Canell)
The Players, 1974 (director; writer)
Stress: The Two-Faced Enemy, 1974 (director; writer; producer)
Thunderbirds in China, 1974 (writer; producer)
Van's Camp, 1974 (co-director with Les Rose; writer; producer)
Arctic IV, 1975 (writer)
His Worship, Mr. Montréal: The Life and Times of Camillien Houde, 1975 (co-director with Marrin Canell and Robert Duncan; writer; producer)
The Summer Before, 1975 (director; writer)
Whistling Smith, 1975 (writer)
The Sword of the Lord, 1976 (writer)
Volcano: An Inquiry Into the Life and Death of Malcolm Lowry, 1976 (co-director with John Kramer; writer; producer)
Henry Ford's America, 1977 (director; writer; producer)
The Vacant Lot, 1977 (writer; producer)
The Champions, Part 1: Unlikely Warriors, 1978 (director; writer; producer; TV)
The Champions, Part 2: Trappings of Power, 1978 (director; writer; producer; TV)
The Dionne Quintuplets, 1978 (director; producer; TV)
Has Anybody Here Seen Canada?, 1978 (writer; TV)
In Search of Bermuda Pirates, 1978 (director; writer; producer)
In Search of the Great Lakes Triangle, 1978 (director; writer; producer)
Secrets of the Bermuda Triangle, 1978 (director; writer; producer)
Small Is Beautiful: Impressions of Fritz Schumacher, 1978 (co-director with Dougles Kiefer and Barrie Howells; writer)
Bow and Arrow, 1979 (writer)
Paperland: The Bureaucrat Observed, 1979 (director; writer; TV)
The Lost Pharaoh: The Search for Akhenaten, 1980 (director; TV)
Wop May, 1980 (writer)
Bamboo, Lions and Dragons, 1981 (writer)
On Guard for Thee, Parts 1-3, 1981 (director; writer; producer; TV)
Running Man, 1981 (director; TV)
Dream Horse, 1982 (director; writer; producer; TV)
An Honourable Member, 1982 (director; TV)
The Accident, 1983 (director; TV)
Something to Celebrate, 1983 (director; writer; producer; TV)
Act of God - A Gathering in Denendeh, 1984 (writer)
The Children's Crusade, 1984 (director; writer; producer; TV)
Overtime, 1984 (writer)
Canada’s Sweetheart, 1985 (director; writer; producer; TV)
Earthwatch, 1985 (director; writer; producer)
First Stop, China, 1985 (writer)
The Champions, Part 3, 1986 (director; writer; TV)
Long Lance, 1986 (writer)
Mobility, 1986 (writer)
Tommy Douglas: Keeper of the Flame, 1986 (writer)
The King Chronicle, 1987 (director; writer; TV)
Goddess Remembered, 1989 (writer)
Family: A Loving Look at CBC Radio, 1991 (director; writer; film completed by Robert Duncan)
Note: Updated to January 2003.