| Movie | 1962 | Birdman of Alcatraz | Feto Gomez | |
| Movie | 1969 | On Her Majesty's Secret Service | Ernst Stavro Blofeld | |
| Movie | 1967 | The Dirty Dozen | Archer Maggott | |
| Movie | 1965 | The Greatest Story Ever Told | Pontius Pilate | |
| Movie | 1961 | Mad Dog Coll | Lt. Dawson | |
| Movie | 1965 | Genghis Khan | Shan | |
| Movie | 1973 | Lisa and the Devil | Leandro | |
| Movie | 1964 | The New Interns | Dr. Dominic Riccio | |
| Movie | 1962 | Cape Fear | Private Detective Charles Sievers | |
| Movie | 1969 | Land Raiders | Vince Carden | |
| Movie | 1970 | Kelly's Heroes | Master Sergeant "Big Joe" | |
| Movie | 1967 | The Karate Killers | Count De Fanzini | |
| Movie | 1977 | Capricorn One | Albain | |
| Movie | 1979 | Beyond the Poseidon Adventure | Captain Stefan Svevo | |
| Movie | 1984 | Cannonball Run II | Hymie | |
| Movie | 1970 | Violent City | Al Weber | |
| Movie | 1968 | The Scalphunters | Jim Howie | |
| Movie | 1972 | Horror Express | Captain Kazan | |
| Movie | 1968 | Buona Sera, Mrs. Campbell | Walter Braddock | |
| Movie | 1965 | Battle of the Bulge | Sgt. Guffy | |
| Movie | 1988 | Faceless | Terry Hallen | |
| Movie | 1979 | Escape to Athena | Zeno | |
| Movie | 1987 | The Dirty Dozen: The Deadly Mission | Maj. Wright | |
| Movie | 1988 | The Dirty Dozen: The Fatal Mission | Maj. Wright | |
| Movie | 1972 | A Reason to Live, a Reason to Die | Major Ward | |
| Movie | 1971 | A Town Called Hell | Don Carlos | |
| Movie | 1969 | Mackenna's Gold | Sergeant Tibbs | |
| Movie | 1965 | The Slender Thread | Dr. Joe Coburn | |
| Movie | 1971 | Pretty Maids All in a Row | Captain Sam Surcher | |
| Movie | 1969 | The Assassination Bureau | Lord Bostwick | |
| Movie | 1973 | Redneck | Memphis | |
| Movie | 1976 | Killer Force | Webb | |
| Movie | 1972 | Pancho Villa | Pancho Villa | |
| Movie | 1963 | Johnny Cool | Vincenzo 'Vince' Santangelo | |
| Movie | 1961 | The Young Savages | Detective Lt. Gunderson | |
| Movie | 1975 | Inside Out | Harry Morgan | |
| Movie | 1972 | Crime Boss | Don Vincenzo | |
| Movie | 1972 | The Killer Is on the Phone | Ranko Drasovic | |
| Movie | 1964 | Fanfare for a Death Scene | Ilchidai Khan | |
| Movie | 1980 | The Border | Frank Cooper | |
| Movie | 1972 | Sonny and Jed | Sheriff Franciscus | |
| Movie | 1963 | Love Is a Ball | Dr. Christian Gump (Millie's uncle) | |
| Movie | 1995 | Backfire! | Most Evil Man | |
| Movie | 1991 | Perfect Crimes | Self - Narrator | |
| Movie | 1963 | The Man from the Diners' Club | Mr. Martindale | |
| Movie | 1968 | Sol Madrid | Emil Dietrich | |
| Movie | 1971 | Mongo's Back in Town | Lieutenant Pete Tolstad | |
| Movie | 1985 | Beyond Reason | Dr. Nicholas Mati | |
| Movie | 1966 | Beau Geste | Sgt. Maj. Dagineau | |
| Movie | 1962 | The Interns | Dr. Dominic Riccio | |
| Movie | 1987 | Return to the Titanic... Live! | Host | |
| Movie | 1973 | She Cried Murder | Inspector Joe Brody | |
| Movie | 1982 | Fake-Out | Lt. Thurston | |
| Movie | 1975 | The House of Exorcism | Leandro (archive footage) | |
| Movie | 1984 | The Cartier Affair | Phil Drexler | |
| Movie | 2012 | Remote Control Magic: The Movie | Self (archive footage) | |
| Movie | 1989 | The Hollywood Detective | Harry Bell | |
| Movie | 1979 | The Muppet Movie | El Sleazo Tough | |
| Movie | 2006 | Operation Dirty Dozen | Self | |
| Movie | 1969 | Crooks and Coronets | Herbie Haseler | |
| Movie | 1980 | Alcatraz: The Whole Shocking Story | Cretzer | |
| Movie | 1981 | Telly Savalas Looks at Aberdeen | Narrator | |
| Movie | 1981 | Telly Savalas Looks at Birmingham | Narrator | |
| Movie | 1987 | Kojak: The Price of Justice | Inspector Theo Kojak | |
| Movie | 2022 | La TV des 70's : Quand Giscard était président | Self (archive footage) | |
| Movie | 1981 | Telly Savalas Looks at Portsmouth | Narrator | |
| Movie | 1982 | Silent Rebellion | Pete | |
| Movie | 1971 | Clay Pigeon | Redford | |
| Movie | 1994 | Mind Twister | Richard Howland | |
| Movie | 2010 | 2Everything2Terrible2: Tokyo Drift | Self (archive footage) | |
| Movie | 1972 | Visions... | Lt. Phil Keegan | |
| Movie | 1989 | Kojak : Error Fatal | Lieutenant Theo Kojak | |
| Movie | 1990 | Kojak: Flowers For Matty | Inspector Theo Kojak | |
| Movie | 1985 | Kojak The Belarus File | Lieutenant Theo Kojak | |
| Movie | 1989 | Kojak: Ariana | Lieutenant Theo Kojak | |
| Movie | 1990 | Kojak: None So Blind | Inspector Theo Kojak | |
| Movie | 1973 | The Marcus-Nelson Murders | Lt. Theo Kojak | |
| Movie | 1981 | Hellinger's Law | Nick Hellinger | |
| Movie | 1976 | Joys | Self | |
| Movie | 1987 | The Equalizer - The Movie: Blood & Wine | Brother Joseph Heiden | |
| Movie | 1961 | The Sin of Jesus | Felix | |
| Movie | 1965 | John Goldfarb, Please Come Home! | Macmuid (uncredited) | |
| Movie | 1986 | The Flintstones' 25th Anniversary Celebration | | |
| Movie | 1986 | GoBots: Battle of the Rock Lords | Magmar (voice) | |
| Movie | 2011 | Paul Williams Still Alive | Self (archive footage) | |
| Movie | 1991 | Rose Against the Odds | George Parnassus | |
| Movie | 1990 | Kojak: It's Always Something | Inspector Theo Kojak | |
| Movie | 2020 | Charles Bronson: The Spirit of Masculinity | Self (archive footage) | |
| Movie | 1976 | Telly... Who Loves Ya, Baby? | Self | |
| Movie | 1984 | Afghanistan For What? | | |
| Movie | 2021 | Django & Django: Sergio Corbucci Unchained | Self - Actor (archive footage) | |
| TV Show | 1976 | Alice | | 1 |
| TV Show | 1967 | Garrison's Gorillas | | 1 |
| TV Show | 1963 | Burke's Law | Fakir George O'Shea | 1 |
| TV Show | 1961 | Cain's Hundred | Frank Meehan | 1 |
| TV Show | 1971 | The Sonny & Cher Comedy Hour | | 1 |
| TV Show | 1963 | Kraft Suspense Theatre | Beret | 1 |
| TV Show | 1965 | The F.B.I. | Ed Clementi | 2 |
| TV Show | 1979 | Tales of the Unexpected | Joe Brisson | 1 |
| TV Show | 1979 | Okay | Self | 1 |
| TV Show | 1958 | Naked City | Gabriel Hody | 1 |
| TV Show | 1973 | Kojak | Theo Kojak | 118 |
| TV Show | 1963 | Arrest and Trial | Frank Santo | 1 |
| TV Show | 1985 | The Equalizer | Brother Joseph Heiden | 2 |
| TV Show | 1962 | Combat! | Colonel Kapsalis | 1 |
| TV Show | 1959 | The Twilight Zone | Erich Streator | 1 |
| TV Show | 1963 | The Fugitive | Steve Keller | 1 |
| TV Show | 1961 | Acapulco | Mr. Carver | 8 |
| TV Show | 1965 | Run for Your Life | Istvan Zabor | 1 |
| TV Show | 1967 | Cimarron Strip | | 1 |
| TV Show | 1963 | The Fugitive | Victor Leonetti | 1 |
| TV Show | 1962 | The Virginian | 'Colonel' Bliss | 1 |
| TV Show | 1960 | The Aquanauts | Paul Price | 1 |
| TV Show | 1963 | Grindl | | 1 |
| TV Show | 1964 | The Rogues | | 1 |
| TV Show | 1963 | The Dakotas | Jake Volet | 1 |
| TV Show | 1961 | Ben Casey | | 1 |
| TV Show | 1961 | The New Breed | Dr. Buel Reed | 1 |
| TV Show | 1959 | The Detectives | Ben | 1 |
| TV Show | 1963 | The Fugitive | Dan Polichek | 1 |
| TV Show | 1958 | 77 Sunset Strip | Brother Hendricksen | 1 |
| TV Show | 1985 | Alice in Wonderland | Cheshire Cat | 1 |
| TV Show | 1987 | J.J. Starbuck | The Greek | 1 |
| TV Show | 1974 | Tony Orlando and Dawn | Self | 1 |
| TV Show | 1964 | The Man from U.N.C.L.E. | Count Valeriano De Fanzini | 2 |
| TV Show | 1974 | Am laufenden Band | Self - Guest | 1 |
| TV Show | 1971 | Disco | Self | 1 |
| TV Show | 1990 | Ein Schloß am Wörthersee | Teddy | 1 |
| TV Show | 1961 | Cain's Hundred | Harry Remick | 1 |
| TV Show | 1962 | Combat! | Jon | 1 |
| TV Show | 1963 | Burke's Law | Balakirov aka Richard Goldtooth | 1 |
| TV Show | 1963 | Burke's Law | Charlie Prince | 1 |
| TV Show | 1950 | The Bob Hope Show | Self | 2 |
| TV Show | 1962 | The Tonight Show Starring Johnny Carson | Self | 11 |
| TV Show | 1979 | The French Atlantic Affair | Fr. Craig Dunleavy | 3 |
| TV Show | 1963 | Kraft Suspense Theatre | Ramon Castillo / Raymond Castle | 1 |
| TV Show | 1961 | The Mike Douglas Show | Self | 5 |
| TV Show | 1959 | Bonanza | Charles Augustus Hackett | 1 |
| TV Show | 1963 | Bob Hope Presents the Chrysler Theatre | Mueller | 1 |
| TV Show | 1971 | V.I.P. Schaukel | Self | 2 |
| TV Show | 1964 | Einer wird gewinnen | Self | 1 |
| TV Show | 1972 | Musikladen | Self | 1 |
| TV Show | 1959 | The Untouchables | Leo Stazak | 1 |
| TV Show | 1948 | Bambi-Verleihung | Self | 1 |
| TV Show | 1967 | The Carol Burnett Show | Self - Guest / Various Characters | 1 |
| TV Show | 1975 | Les Rendez-vous du dimanche | Self | 1 |
| TV Show | 1975 | Midi Première | Self | 1 |
| TV Show | 1950 | Armstrong Circle Theatre | | 1 |
| TV Show | 1980 | Alcatraz: The Whole Shocking Story | Cretzer | 2 |
| TV Show | 1962 | The Tonight Show Starring Johnny Carson | Self - Guest Host | 1 |
| TV Show | 1973 | The Dean Martin Celebrity Roasts | Self | 2 |
| TV Show | 1951 | The Red Skelton Show | Self / Tex | 1 |
| TV Show | 1944 | Golden Globe Awards | Self - Nominee | 3 |
| TV Show | 1962 | The Alfred Hitchcock Hour | Philadelphia Harry | 1 |
| TV Show | 1944 | Golden Globe Awards | Self - Presenter | 1 |
| TV Show | 1991 | The Commish | Tommy Colette | 3 |
| TV Show | 1977 | The Love Boat | Dr. Fabian Cain | 2 |
| TV Show | 1974 | Dinah! | Self | 3 |
| TV Show | 1964 | Top of the Pops | Self | 1 |
