Credits

• 2010 · The Back-Up Plan as Arthur
• 2009 · Santa Buddies as Santa Paws (voice)
• 2008 · Charlie & Me as Charlie
• 2005 · Confession as Father Abbot Sutton
• 2005 · Popstar as Harvey
• 2005 · The Fallen Ones as Rabbi Eli Schmitt
• 2005 · Geppetto's Secret as Geppetto (voice)
• 2004 · Christmas at Water's Edge as Harry
• 2004 · Broadway's Lost Treasures II as Fiorello LaGuardia (segment "Fiorello!")
• 2004 · Felix the Cat Saves Christmas as Santa Claus
• 2004 · Living in TV Land as
• 2004 · Weezer: Video Capture Device - Treasures from the Vault 1991-2002 as Howard Cunningham ("Buddy Holly") (voice) (archive footage)
• 2003 · One Tree Hill as Mel McFadden
• 2003 · Broadway: The Golden Age, by the Legends Who Were There as Self
• 2002 · Mary Christmas as Les Turner
• 2002 · Still Standing as
• 2001 · The Legend of the Candy Cane as Franklin Holz (voice)
• 2000 · The Tangerine Bear: Home in Time for Christmas! as Mr. Winkle (voice)
• 1999 · Family Law as Kyle Mason
• 1999 · Family Guy as Howard Cunningham (voice)
• 1998 · That '70s Show as Dr. Hammond
• 1998 · Little Bigfoot 2: The Journey Home as Ranger Tasker
• 1996 · Early Edition as
• 1995 · The Drew Carey Show as Mr. Bobeck
• 1994 · Touched by an Angel as Elmer
• 1994 · ER as Walter Nikolaides
• 1994 · Burke's Law as Dr. Burke
• 1993 · Walker, Texas Ranger as Minister
• 1990 · Fire and Rain as Derryl Price
• 1990 · The Making of 'It's a Wonderful Life' as Self - Host
• 1990 · The Love Boat: A Valentine Voyage as Lt. Logan
• 1989 · Wicked Stepmother as Lt. MacIntosh
• 1989 · Father Dowling Mysteries as Father Frank Dowling
• 1988 · Couples Do It Debbie's Way as
• 1987 · Fatal Confession: A Father Dowling Mystery as Father Frank Dowling
• 1987 · Pinocchio and the Emperor of the Night as Geppetto (voice)
• 1987 · Million Dollar Mystery as Sidney Preston
• 1986 · Perry Mason: The Case of the Notorious Nun as Father Chris DeLeon
• 1985 · Private Sessions as Harry O'Reilly
• 1984 · Murder, She Wrote as Amos Tupper
• 1984 · Finder of Lost Loves as Malcolm Beck
• 1984 · The Jesse Owens Story as Jimmy Hoffa
• 1982 · Hotel as
• 1982 · Night of 100 Stars as Self
• 1982 · O'Hara's Wife as Fred O'Hara
• 1980 · For the Love of It as Norman
• 1980 · Here's Boomer as
• 1979 · Pat Boone and Family: A Christmas Special as Self
• 1979 · Black Market Baby as Dr. Andrew Brantford
• 1979 · The Return of Mod Squad as Frank Webber
• 1979 · The Rebels as Benjamin Franklin
• 1979 · The Castaways on Gilligan's Island as Henry Elliott
• 1979 · Tales of the Unexpected as Ralph Stackpole
• 1979 · The Triangle Factory Fire Scandal as Morris Feldman
• 1979 · Sitcom: The Adventures of Garry Marshall as Himself
• 1978 · The Stingiest Man in Town as B.A.H. Humbug (voice)
• 1978 · The Bastard as Benjamin Franklin
• 1978 · With This Ring as Edward Edwards
• 1977 · The Love Boat as Howard Pfister
• 1977 · The Love Boat as Harry Meacham
• 1977 · The Love Boat as George Hammond
• 1976 · A Special: Olivia Newton-John as
• 1976 · That's Hollywood as Narrator
• 1976 · The Captain and Tennille as Self
• 1976 · The Love Boat as George Havlicek
• 1976 · Gus as Spinner
• 1975 · The Night That Panicked America as Norman Smith
• 1975 · Ellery Queen as Bud Armstrong
• 1975 · Mitzi & 100 Guys as Self
• 1975 · The Last Survivors as Marcus Damian
• 1975 · Who Is the Black Dahlia? as Bevo Means
• 1974 · Death Cruise as David Mason
• 1974 · Dinah! as Self
• 1974 · Mixed Company as Al
• 1974 · The Girl Who Came Gift-Wrapped as Harold
• 1974 · Happy Days as Howard Cunningham
• 1973 · Miracle on 34th Street as Judge Harper
• 1972 · The Streets of San Francisco as
• 1972 · The Streets of San Francisco as Saretti
• 1972 · The Streets of San Francisco as Eddie Clark
• 1972 · No Place to Run as Dr. Golinski
• 1972 · The Sandy Duncan Show as
• 1972 · The Streets of San Francisco as
• 1972 · Banyon as
• 1972 · The Paul Lynde Show as Congressman Landis
• 1972 · Maude as Dr. Tasko
• 1972 · Temperatures Rising as Gibson
• 1972 · Wait Till Your Father Gets Home as Harry Boyle
• 1972 · To Find a Man as Dr. Katchaturian
• 1972 · The Sixth Sense as
• 1972 · Me and the Chimp as
• 1971 · Mr. and Mrs. Bo Jo Jones as Mr. Jones
• 1971 · McMillan and Wife as Sam Hamilton
• 1971 · Sarge as Stanley Miller
• 1971 · Congratulations, It's a Boy! as Herb
• 1971 · Funny Face as
• 1971 · Vanished as Johnny Cavanaugh
• 1971 · A Step Out of Line as Jack Berger
• 1971 · Great Performances as Self - Host
• 1970 · Night Gallery as Jules Kettleman (segment "Make Me Laugh")
• 1970 · Night Gallery as Sidney Resnick
• 1969 · Night Gallery as Sidney Resnick
• 1969 · Love, American Style as Jack Smallerd
• 1969 · Love, American Style as Alan Walker
• 1969 · Love, American Style as Dr. Y.A. Harris
• 1969 · Love, American Style as Harry Boyle (voice)
• 1969 · Medical Center as
• 1969 · The Debbie Reynolds Show as Bob Landers
• 1969 · The Bill Cosby Show as Cookie Maharg
• 1969 · Marcus Welby, M.D.: A Matter of Humanities as Tiny Baker
• 1968 · The Mod Squad as
• 1968 · The Name of the Game as Charlie Reid
• 1968 · Yours, Mine and Ours as Family Doctor
• 1968 · The Secret War of Harry Frigg as Gen. Roscoe Pennypacker
• 1967 · The Bang-Bang Kid as Meriwether P. Newberry
• 1967 · Divorce American Style as Farley
• 1966 · Mission: Impossible as
• 1966 · Jericho as
• 1966 · The Girl from U.N.C.L.E. as
• 1965 · The F.B.I. as John Clanton
• 1965 · Get Smart as
• 1964 · Profiles in Courage as Senator George W. Norris
• 1964 · Bewitched as
• 1964 · The World of Henry Orient as Frank Boyd
• 1963 · Love with the Proper Stranger as Anthony Columbo
• 1962 · Arsenic & Old Lace as Teddy Brewster
• 1961 · Ben Casey as
• 1961 · Dr. Kildare as Harry Markham
• 1961 · The Defenders as Charlie Barry
• 1960 · Route 66 as Dr. Summer Klein
• 1960 · Route 66 as Jim Horst
• 1960 · The Right Man as Throttlebottom
• 1959 · Bonanza as Hiram Peabody
• 1959 · Bonanza as Titus Simpson
• 1958 · Naked City as Judge
• 1956 · Tony Awards as Self - Presenter
• 1956 · Tony Awards as Self - Performer
• 1956 · Tony Awards as Self (archive footage)
• 1955 · Alice in Wonderland as Knave of Hearts
• 1951 · Hallmark Hall of Fame as Knave of Hearts
• 1951 · Hallmark Hall of Fame as Teddy Brewster