Credits

• 1998 · Lost In Space Forever as The Keeper (archive footage)
• 1995 · Theremin: An Electronic Odyssey as Klaatu (archive footage) (uncredited)
• 1979 · The Horror Show as (archive footage)
• 1970 · Assignment Terror as Dr. Odo Warnoff
• 1969 · The Battle of El Alamein as Bernard Law Montgomery
• 1969 · Stoney as Harvey Ward
• 1968 · Subterfuge as Goldsmith
• 1968 · The Last Chance as George McConnell
• 1968 · Seven Into Hell as Blynn
• 1968 · The Devil's Brigade as Lt. Gen. Mark Clark
• 1968 · The Power as Arthur Nordlund
• 1968 · Naked You Die as Inspector Durand
• 1967 · Death on the Run as Major Worthington Clark
• 1967 · The Danny Thomas Hour as Paul Heaton
• 1967 · Hondo as
• 1967 · Hondo and the Apaches as Tribolet
• 1967 · Hotel as Geoffrey - Duke of Lanbourne
• 1967 · The Invaders as Magnus
• 1967 · The Invaders as Vice Chancellor Pierre Alquist
• 1966 · Cyborg 2087 as Garth A7
• 1966 · Jericho as
• 1966 · The Time Tunnel as Capt. Malcolm Smith
• 1966 · Batman as Sandman
• 1966 · Ride Beyond Vengeance as Brooks Durham
• 1965 · The F.B.I. as Conrad Letterman
• 1965 · The F.B.I. as Albert Robinson / Major John Anka
• 1965 · The F.B.I. as Eric Reverson
• 1965 · Lost in Space as The Keeper
• 1965 · Branded as
• 1964 · Daniel Boone as Maj. Peter Wellington
• 1964 · Daniel Boone as Edgar Newton
• 1964 · The Man from U.N.C.L.E. as
• 1964 · 12 O'Clock High as
• 1963 · Mary, Mary as Dirk Winston
• 1963 · Kraft Suspense Theatre as Robert Thurston
• 1963 · Bob Hope Presents the Chrysler Theatre as
• 1963 · Bob Hope Presents the Chrysler Theatre as Edward Parker Greene
• 1963 · The Great Adventure as President Jefferson Davis
• 1962 · The Alfred Hitchcock Hour as Ralph Manson
• 1962 · The Virginian as Michael O'Rourke
• 1961 · The Dick Powell Show as Inspector Marshall
• 1961 · The Dick Powell Show as General Conrad Munday
• 1960 · Route 66 as
• 1960 · The Barbara Stanwyck Show as Julius
• 1960 · The Lost World as Lord John Roxton
• 1959 · Third Man on the Mountain as Captain John Winter
• 1959 · Perilous Assignment as Self
• 1959 · The Third Man as
• 1959 · Bonanza as Prof. Poppy / Dr. P.A. Mundy
• 1958 · Battle of the V-1 as Stefan
• 1957 · Suspicion as Angus Martin
• 1957 · DuPont Show of the Month as
• 1957 · Perry Mason as Prof. Edward Lindley
• 1957 · Omar Khayyam as Hasani Sabah
• 1957 · Island in the Sun as Hilary Carson
• 1956 · Teenage Rebel as Jay Fallon
• 1956 · Dick Powell's Zane Grey Theatre as Matthew Birch
• 1956 · Dick Powell's Zane Grey Theatre as Grant Coburn
• 1956 · Dick Powell's Zane Grey Theatre as Marshal Locke Gardner
• 1955 · The Rains of Ranchipur as Lord Albert Esketh
• 1955 · Seven Cities of Gold as Father Junipero Serra
• 1955 · The 20th Century Fox Hour as Narrator
• 1955 · Alfred Hitchcock Presents as Allen Bliss
• 1955 · Alfred Hitchcock Presents as Sir Humphrey J. Orford
• 1955 · Dr. Jekyll and Mr. Hyde as Dr. Henry Jekyll / Mr. Hyde
• 1955 · Soldier of Fortune as Inspector Merryweather, Hong Kong Marine Police
• 1954 · Désirée as Bernadotte
• 1954 · Climax! as Lord Edward Dominey / Major General Von Raggenstein
• 1954 · Climax! as Dr. Henry Jekyll / Mr. Hyde
• 1954 · Climax! as Charles Martin Westling
• 1954 · Climax! as 'Irish' Sean Dillon
• 1954 · Climax! as James MacLennan
• 1954 · Climax! as Dr. Fitzroy
• 1954 · Climax! as Lorenzo
• 1954 · Mambo as Enrico Marisoni
• 1954 · Princess of the Nile as Rama Khan
• 1954 · Demetrius and the Gladiators as Peter
• 1953 · King of the Khyber Rifles as Brig. Gen. J. R. Maitland
• 1953 · The Robe as Peter
• 1953 · Dangerous Crossing as Dr. Paul Manning
• 1953 · Sailor of the King as Lt. Richard Saville
• 1953 · The Desert Rats as Narrator (voice) (uncredited)
• 1953 · Titanic as End Narrator (Voice)
• 1952 · Les Miserables as Jean Valjean
• 1952 · 5 Fingers as Colin Travers
• 1952 · Phone Call from a Stranger as Dr. Robert Fortness
• 1951 · The House in the Square as Roger Forsyth
• 1951 · The Desert Fox: The Story of Rommel as Narrator (voice) (uncredited)
• 1951 · Schlitz Playhouse of Stars as
• 1951 · The Day the Earth Stood Still as Klaatu, alias Mr. Carpenter
• 1951 · The 13th Letter as Dr. Pearson
• 1950 · Trio as Major George Templeton (segment Sanatorium)
• 1950 · The Black Rose as King Edward
• 1950 · The Body Said No! as
• 1949 · Miss Pilgrim's Progress as Bob Thane
• 1949 · The Golden Madonna as Mike Christie
• 1948 · Uneasy Terms as Slim Callaghan
• 1948 · Idol of Paris as Hertz
• 1947 · White Cradle Inn as Rudolph
• 1947 · The Root of All Evil as Charles Mortimer
• 1945 · Caesar and Cleopatra as 1st Centurion
• 1945 · The Wicked Lady as Kit Locksby
• 1945 · I'll Be Your Sweetheart as
• 1943 · The Sky’s the Limit as George
• 1942 · The Big Blockade as George
• 1941 · Tower of Terror as Anthony Hale
• 1941 · Ships with Wings as Lieut. Maxwell
• 1941 · Turned Out Nice Again as Diner
• 1941 · 'Pimpernel' Smith as Prison Camp Officer
• 1941 · The Patient Vanishes as Inspector
• 1941 · Dangerous Moonlight as Kapulski
• 1939 · This Man in Paris as Gang Member (uncredited)
• 1938 · Bank Holiday as Guardsman (uncredited)
• 1938 · The Divorce of Lady X as Minor Role (uncredited)
• 1937 · The Squeaker as Medical Examiner
• 1937 · The Gap as Chemist-Radio Operator (uncredited)
• 1937 · Gangway as Ship's Officer
• 1936 · The Conquest of the Air as Marquis d'Arlandes (uncredited)
• 1936 · The Man Who Could Work Miracles as San Francisco Cop
• 1936 · Secret Agent as Army Captain (uncredited)