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| Title | Year | Status | Character |
|---|
| Hot in Cleveland | 2012 | TV Series | Mr. Sherden |
| Whatever Happened To? | 2009 | TV Series |
| The King of Queens | 2006 | TV Series | Frank |
| Curb Your Enthusiasm | 2005 | TV Series | Mac |
| Las Vegas | 2003 | TV Series | Charlie Blue |
| Ablaze | 2001 | Stuart Ridgley |
| These Old Broads | 2001 | TV Movie | Tony Frank (as Pat Harrington) |
| As Told by Ginger | 2000 | TV Series | Arnie |
| Diagnosis Murder | 1999 | TV Series | Mr. Reese |
| Fantasy Island | 1999 | TV Series | Dirk |
| Aaahh!!! Real Monsters | 1994-1997 | TV Series | Shorty McGinty / Cop #2 / Washington / ... |
| The Wayans Bros. | 1996 | TV Series | Mr. Neidermeyer |
| Kirk | 1995 | TV Series | Stan Lee |
| Spring Fling! | 1995 | TV Movie | Guido Mazzolini |
| Burke's Law | 1995 | TV Series |
| Empty Nest | 1995 | TV Series | 'Tornado' Mulvaney |
| The George Carlin Show | 1995 | TV Series | Brian |
| Silk Stalkings | 1994 | TV Series | Benny Lorenzo |
| Duckman: Private Dick/Family Man | 1994 | TV Series |
| I Yabba-Dabba Do! | 1993 | TV Movie | Additional Voices (voice, as Pat Harrington) |
| Civil Wars | 1992 | TV Series | Danny Zane |
| Street Justice | 1992 | TV Series | Felker |
| Round Trip to Heaven | 1992 | George |
| The Trials of Rosie O'Neill | 1992 | TV Series |
| Yo Yogi! | 1991 | TV Series | William Shakesbear |
| The Golden Girls | 1991 | TV Series | John |
| Murder, She Wrote | 1985-1991 | TV Series | Nick Cullhane / Lt. Lou Brickman / Gunnar Globle / ... |
| Sydney | 1990 | TV Series | Georgie |
| The Ray Bradbury Theater | 1989 | TV Series | Robert |
| Duet | 1989 | TV Series | George |
| A Garfield Christmas Special | 1987 | TV Short | Dad (voice, as Pat Harrington) |
| Rowdies | 1986 | TV Movie | Calvin T. 'Rowdy' Harlan |
| Hotel | 1986 | TV Series | Jack Allen |
| Crazy Like a Fox | 1985 | TV Series |
| Comedy Factory | 1985 | TV Series | Max Brenner |
| Who's the Boss? | 1985 | TV Series | Dominic Burgozzi |
| Glitter | 1984 | TV Series | Blake |
| The Love Boat | 1977-1984 | TV Series | Dr. Milton Foster / Prince Hassan / Hank Vosnick / ... |
| One Day at a Time | 1975-1984 | TV Series | Dwayne F. Schneider / Dwayne Schneider |
| Between Two Brothers | 1982 | TV Movie | Russ Frazer |
| Captain Caveman and the Teen Angels | 1977-1980 | TV Series | Additional Voices |
| The Last Convertible | 1979 | TV Mini-Series | Major Fred Goodman |
| The Critical List | 1978 | TV Movie | Jimmy Regosi |
| Benny and Barney: Las Vegas Undercover | 1977 | TV Movie | Joey Gallion |
| The Pink Panther Laugh and a Half Hour and a Half Show | 1976 | TV Series | The Inspector / Sgt. Deux Deux (voice) |
| Good Heavens | 1976 | TV Series | Pete Benson |
| Insight | 1966-1976 | TV Series |
| The Invisible Man | 1975 | TV Series | Warden |
| Ellery Queen | 1975 | TV Series | Mitchell McCully |
| McMillan & Wife | 1974-1975 | TV Series | Preston Halsey / Nino Mordanti |
| Fay | 1975 | TV Series | Vic |
| Police Woman | 1975 | TV Series | Fred Blau |
| Police Story | 1975 | TV Series | Ray Boland |
| Kolchak: The Night Stalker | 1975 | TV Series | Thomas Kitzmiller |
| Let's Switch! | 1975 | TV Movie | Randy Colbert |
| Columbo | 1974 | TV Series | Buddy Castle |
| The Nine Lives of Fritz the Cat | 1974 | voice |
| The Healers | 1974 | TV Movie | Joe Tate |
| Banacek | 1974 | TV Series | Phil Ross |
| The New Dick Van Dyke Show | 1974 | TV Series | Fred Bishop |
| Owen Marshall, Counselor at Law | 1971-1974 | TV Series | DA Charlie Gianetta |
| Chase | 1974 | TV Series | Nico |
| Faraday and Company | 1973 | TV Series | Shanks |
| Wait Till Your Father Gets Home | 1972-1973 | TV Series |
| The Affair | 1973 | TV Movie | Frank (as Pat Harrington) |
| The New Perry Mason | 1973 | TV Series | Lukas Dawes |
| The Partridge Family | 1970-1973 | TV Series | Roger Harper / Harry |
| Love, American Style | 1970-1973 | TV Series | Dan / Bill Hanson (segment "Love and the Jealous Husband") / Alvin Doff (segment "Love and the Boss's Ex") |
| The Girl with Something Extra | 1973 | TV Series | Fred Fowler |
| The Rookies | 1973 | TV Series | Arnold Winkler |
| The Addams Family | 1973 | TV Series voice |
| Savage | 1973 | TV Movie | Russell |
| Circle of Fear | 1973 | TV Series | Mark Riceman |
| The New Temperatures Rising Show | 1972 | TV Series | Tip Henry |
| The ABC Saturday Superstar Movie | 1972 | TV Series | Hi-Rise / First Cyclone |
| The New Scooby-Doo Movies | 1972 | TV Series | Moe Howard |
| The Candidate | 1972 | Dinner MC (uncredited) |
| Every Little Crook and Nanny | 1972 | Willie Shakespeare (as Pat Harrington) |
| Wednesday Night Out | 1972 | TV Movie |
| The Courtship of Eddie's Father | 1972 | TV Series | Peter Stowe |
| Nanny and the Professor | 1971 | TV Series | Businessman |
| Cade's County | 1971 | TV Series | Eddie Collins |
| The Bold Ones: The Lawyers | 1971 | TV Series | Cox |
| Marcus Welby, M.D. | 1971 | TV Series | Chris Rossi |
| The Interns | 1970-1971 | TV Series | John Snyder / Snyder |
| The New Andy Griffith Show | 1971 | TV Series | Mr. Crawford |
| The Most Deadly Game | 1970 | TV Series | Lt. Riverton |
| The Flying Nun | 1970 | TV Series | Harry |
| Here Come the Brides | 1970 | TV Series | J. Montague Morgan |
| The Computer Wore Tennis Shoes | 1969 | Moderator (as Pat Harrington) |
| The Pink Panther Show | 1969 | TV Series | Inspector (voice) |
| Aquaman | 1968-1969 | TV Series | The Atom
Speedy |
| Mr. Deeds Goes to Town | 1969 | TV Series | Tony Lawrence |
| Carte Blanched | 1969 | Short | Inspector (voice) |
| The Outsider | 1968-1969 | TV Series | Mr. Wainwright / Borden |
| 2000 Years Later | 1969 | Franchot |
| Pierre and Cottage Cheese | 1969 | Short | Inspector (voice) |
| French Freud | 1969 | Short | Inspector (voice) |
| La Feet's Defeat | 1968 | Short | Inspector (voice) |
| Le Ball and Chain Gang | 1968 | Short | Inspector (voice) |
| Le Great Dane Robbery | 1968 | Short | Inspector (voice) |
| Cherche le phantom | 1968 | Short | Inspector
Sergeant Deux-Deux (voice) |
| Bear De Guerre | 1968 | Short | Inspector / Bear (voice) |
| Transylvania Mania | 1968 | Short | Inspector (voice) |
| Les Miserobots | 1968 | Short | Inspector (voice) |
| London Derrière | 1968 | Short | Inspector (voice) |
| Good Morning, World | 1968 | TV Series | Duke Vincent |
| Journey to the Center of the Earth | 1967 | TV Series | Alec McEwan / Lars / Torg / ... |
| The President's Analyst | 1967 | Arlington Hewes (as Pat Harrington) |
| The Shooting of Caribou Lou | 1967 | Short | Inspector (voice) |
| Tour De Farce | 1967 | Short | Inspector (voice) |
| Canadian Can-Can | 1967 | Short | Inspector (voice) |
| The Superman/Aquaman Hour of Adventure | 1967 | TV Series | The Atom / Chrystal Man Officer |
| Crow De Guerre | 1967 | Short | Inspector (voice) |
| Le Cop on Le Rocks | 1967 | Short | Inspector (voice) |
| Le Escape Goat | 1967 | Short | Inspector (voice) |
| Le Bowser Bagger | 1967 | Short | Inspector (voice) |
| Le Pig-Al Patrol | 1967 | Short | Inspector (voice) |
| Bomb Voyage | 1967 | Short | Inspector
Sergeant Deux-Deux (voice) |
| Le Quiet Squad | 1967 | Short | Inspector (voice) |
| Captain Nice | 1967 | TV Series | Arthur |
| Easy Come, Easy Go | 1967 | Judd Whitman (as Pat Harrington) |
| Run for Your Life | 1967 | TV Series | Nick Cooper |
| The Man from U.N.C.L.E. | 1965-1967 | TV Series | Peter Sweet / Pierrot La Mouche / Guido Panzini |
| Sacré Bleu Cross | 1967 | Short | Inspector
Sergeant Deux-Deux (voice) |
| Toulouse La Trick | 1966 | Short | Inspector (voice) |
| Unsafe and Seine | 1966 | Short | Inspector
Sergeant Deux-Deux (voice) |
| That's No Lady, That's Notre Dame | 1966 | Short | Inspector
Sergeant Deux-Deux (voice) |
| Sicque! Sicque! Sicque! | 1966 | Short | Inspector
Sergeant Deux-Deux (voice) |
| The Pique Poquette of Paris | 1966 | Short | Inspector
Sergeant Deux-Deux (voice) |
| Ape Suzette | 1966 | Short | Inspector
Sergeant Deux-Deux (voice) |
| Cock-a-Doodle Deux-Deux | 1966 | Short | Inspector
Sergeant Deux-Deux (voice) |
| The Beverly Hillbillies | 1966 | TV Series | Phil Gordon |
| Plastered in Paris | 1966 | Short | Inspector
Sergeant Deux-Deux (voice) |
| Cirrhosis of the Louvre | 1966 | Short | Inspector
Sergeant Deux-Deux (voice) |
| F Troop | 1966 | TV Series | B Wise |
| McHale's Navy | 1966 | TV Series | Guido Panzini |
| Hank | 1966 | TV Series | Rafael Mattera |
| Napoleon Blown-Aparte | 1966 | Short | Inspector
Sergeant Deux-Deux (voice) |
| Reaux, Reaux, Reaux Your Boat | 1966 | Short | Inspector
Sergeant Deux-Deux (voice) |
| The Great De Gaulle Stone Operation | 1965 | Short | Inspector
Sergeant Deux-Deux (voice) |
| The Munsters | 1964-1965 | TV Series | Thatcher / Sonny Harkness |
| The Lucy Show | 1965 | TV Series | Gordon Felson |
| Mr. Novak | 1965 | TV Series | Thomas Kelly |
| The Bing Crosby Show | 1965 | TV Series | Ed |
| The Yellowbird | 1964 | TV Movie |
| The Littlest Hobo | 1964 | TV Series | Brad Turman |
| Kentucky Jones | 1964 | TV Series | Harry Baron |
| Grindl | 1964 | TV Series | Major Wiggins |
| Move Over, Darling | 1963 | District Attorney |
| The Wheeler Dealers | 1963 | Buddy Zack |
| A.P.O. 923 | 1962 | TV Movie | Lt. Edward Jellicoe (as Pat Harrington) |
| The New Steve Allen Show | 1961 | TV Series | Comedian |
| The Jack Paar Tonight Show | 1960 | TV Series | Guido Panzini |
| The Steve Allen Plymouth Show | 1959-1960 | TV Series | Sketch Actor / Sketch Comic / Guido Panzini |
| Alfred Hitchcock Presents | 1960 | TV Series | The Insurance Man |
| Make Room for Daddy | 1959-1960 | TV Series | Pat Hannigan |
| The Alcoa Hour | 1956 | TV Series | Bartender |
| The NBC Comedy Hour | 1956 | TV Series |
| The Elgin Hour | 1955 | TV Series | Benny |
| The Motorola Television Hour | 1953 | TV Series |
| The Plymouth Playhouse | 1953 | TV Series |
| The Ford Theatre Hour | 1949 | TV Series |