William Sylvester

The 9th Wonder of the World: The Making of 'Gorgo'(2013)

Sam Slade (archive footage)

2001: The Making of a Myth(2001)

Dr. Heywood R. Floyd (archive footage) (uncredited)

First Family(1980)

TV Commentator Howard

Heaven Can Wait(1978)

Nuclear Reporter

Riding with Death(1976)

Leonard Driscoll

The Hindenburg(1975)

Luftwaffe Colonel

Busting(1974)

Mr. Weldman

Don't Be Afraid of the Dark(1973)

Tom Henderson

The Challengers(1970)

Brad York

The Lawyer(1970)

Paul Harrison

2001: A Space Odyssey(1968)

Dr. Heywood Floyd

The Hand of Night(1968)

Paul Carver

The Syndicate(1968)

Burt Hickey

Red and Blue(1968)

Trumpeter

You Only Live Twice(1967)

Pentagon Official (uncredited)

Devils of Darkness(1965)

Paul Baxter

Devil Doll(1964)

Mark English

Blind Corner(1964)

Paul Gregory

Ring of Spies(1964)

Gordon Lonsdale

Incident at Midnight(1963)

Vince Warren

Gorgo(1961)

Sam Slade

Offbeat(1961)

Layton / Steve Ross

Information Received(1961)

Rick Hogan

Whirlpool(1959)

Hermann

Dublin Nightmare(1958)

John Kevin

The Caine Mutiny Court-Martial(1958)

High Tide at Noon(1957)

Alec Douglas

Portrait of Alison(1955)

Dave Forrester

The Stranger Came Home(1954)

Philip Vickers

What Every Woman Wants(1954)

Jim Barnes

House of Blackmail(1953)

Jimmy

The Yellow Balloon(1953)

Len Turner

Appointment in London(1953)

Mac

Albert R.N.(1953)

Texas

They Were Not Divided(1950)

American Soldier (uncredited)

Give Us This Day(1949)

Giovanni