Filmography89 titles
| Year | Title | Character | Age at release |
|---|---|---|---|
| 2016 | The Last LaughMovie | Self (archive footage) (uncredited) | 68 |
| 2014 | Turtle Power: The Definitive History of the Teenage Mutant Ninja TurtlesMovie | Self | 66 |
| 2012 | Teenage Mutant Ninja TurtlesSeries | '87 Donatello (voice) | 64 |
| 2006 | Brothers and SistersSeries | Rabbi | 58 |
| 2000 | Curb Your EnthusiasmSeries | Rabbi | 52 |
| 2000 | Randall & Hopkirk (Deceased)Series | — | 52 |
| 1999 | The Green DesertMovie | Alex | 51 |
| 1998 | The HughleysSeries | The Judge | 50 |
| 1997 | Over the TopSeries | — | 49 |
| 1996 | Arli$$Series | Dr. Irv | 48 |
| 1995 | Caroline in the CitySeries | Rabbi Katz | 47 |
| 1995 | Star Trek: VoyagerSeries | Arden Broht | 47 |
| 1994 | ERSeries | Baxter | 46 |
| 1993 | Star Trek: Deep Space NineSeries | Nava | 45 |
| 1993 | SWAT Kats: The Radical SquadronSeries | Razor (voice) | 45 |
| 1992 | Batman: The Animated SeriesSeries | Sheldrake (voice) | 44 |
| 1992 | Beauty and the BeastMovie | Beast (voice) | 44 |
| 1992 | Teenage Mutant Ninja Turtles: The Turtles' Awesome EasterMovie | Donatello / Bebop (voice) | 44 |
| 1991 | Darkwing DuckSeries | Dr. Fossil (voice) | 43 |
| 1991 | The Object of BeautyMovie | Auctioneer | 43 |
| 1991 | Civil WarsSeries | Mel Wittnauer | 43 |
| 1991 | Teenage Mutant Ninja Turtles: Planet of the TurtleoidsMovie | Donatello / Bebop (voice) | 43 |
| 1991 | Teenage Mutant Ninja Turtles: Turtles at the Earth's CoreMovie | Donatello (voice) | 43 |
| 1991 | Teenage Mutant Ninja Turtles: Attack of the Big MACCMovie | Donatello / Bebop (voice) | 43 |
| 1991 | Space CatsSeries | — | 43 |
| 1990 | Tom & Jerry Kids ShowSeries | McLochjaw (voice) | 42 |
| 1990 | Gravedale HighSeries | Reggie Moonshroud (voice) | 42 |
| 1990 | A Family for JoeSeries | — | 42 |
| 1990 | Teenage Mutant Ninja Turtles: Cowabunga, ShredheadMovie | Donatello / Bebop (voice) | 42 |
| 1990 | Teenage Mutant Ninja Turtles: Super Rocksteady and Mighty BebopMovie | Donatello / Bebop (voice) | 42 |
| 1989 | Teenage Mutant Ninja Turtles: The Incredible Shrinking TurtlesMovie | Donatello / Bebop (voice) | 41 |
| 1988 | Empty NestSeries | — | 40 |
| 1988 | Teenage Mutant Ninja Turtles: The Epic BeginsMovie | Donatello / Bebop (voice) | 40 |
| 1988 | Teenage Mutant Ninja Turtles: Heroes in a HalfshellMovie | Donatello / Bebop (voice) | 40 |
| 1988 | Teenage Mutant Ninja Turtles: Hot Rodding TeenagersMovie | Donatello / Bebop (voice) | 40 |
| 1987 | Teenage Mutant Ninja TurtlesSeries | Donatello (voice) | 39 |
| 1987 | RepairsMovie | Lew the Studio Exec | 39 |
| 1987 | Snorks: Bubbles of FunMovie | Junior Wetworth (voice) | 39 |
| 1986 | L.A. LawSeries | Seth Shumay | 38 |
| 1986 | Body SlamMovie | Sheldon Brockmeister | 38 |
| 1986 | The Adventures of the American RabbitMovie | Rob / American Rabbit (voice) | 38 |
| 1986 | ThrobSeries | — | 38 |
| 1986 | Stark: Mirror ImageMovie | Lee Vogel | 38 |
| 1985 | StarkMovie | Lee Vogel | 37 |
| 1984 | SnorksSeries | Junior Wetworth/ Governor Wetworth | 36 |
| 1984 | Mighty OrbotsSeries | Rob Simmons (voice) | 36 |
| 1984 | GallavantsMovie | Edil / Bok / Gauk (voice) | 36 |
| 1982 | Christmas Comes to Pac-landMovie | Inky (voice) | 34 |
| 1982 | Pac-ManSeries | Inky (voice) | 34 |
| 1981 | The Perfect WomanMovie | Emo | 33 |
| 1981 | The Kid Super Power Hour with Shazam!Series | Captain Marvel Jr. / Freddy Freeman (voice) | 33 |
| 1981 | Warp SpeedMovie | David Ingalls | 33 |
| 1981 | Time WarpMovie | M.U.D. (voice) | 33 |
| 1980 | Good Time HarrySeries | — | 32 |
| 1979 | Love at First BiteMovie | Flashlight Vendor | 31 |
| 1979 | SupertrainSeries | Billy Brennan | 31 |
| 1979 | Archie Bunker's PlaceSeries | Gary Rabinowitz | 31 |
| 1977 | The Incredible HulkSeries | Harold Milburn | 29 |
| 1977 | FishSeries | Charlie Harrison | 29 |
| 1977 | Three's CompanySeries | Gilbert Larwin | 29 |
| 1976 | Good HeavensSeries | — | 28 |
| 1976 | JabberjawSeries | Clamhead (voice) | 28 |
| 1976 | The PracticeSeries | — | 28 |
| 1975 | Barney MillerSeries | David Fingler | 27 |
| 1975 | The Bob Crane ShowSeries | — | 27 |
| 1974 | Kolchak: The Night StalkerSeries | — | 26 |
| 1972 | The Don Rickles ShowSeries | — | 24 |
| 1971 | The New Dick Van Dyke ShowSeries | Dennis Whitehead | 23 |
| 1969 | Love, American StyleSeries | Bill | 21 |
| 1969 | Out of ItMovie | Paul | 21 |
| 1967 | MannixSeries | — | 19 |
| 1967 | The Spirit Is WillingMovie | Steve Powell | 19 |
| 1965 | A Thousand ClownsMovie | Nick | 17 |
| 1963 | Arrest and TrialSeries | — | 15 |
| 1962 | The JetsonsSeries | Mechanic (voice) | 14 |
| 1962 | Pressure PointMovie | Patient (as a boy) | 14 |
| 1962 | Hands of a StrangerMovie | Skeet | 14 |
| 1961 | Dr. KildareSeries | Billy Hoffman | 13 |
| 1960 | ThrillerSeries | 'Slip-Slip' | 12 |
| 1959 | StartimeSeries | Larry | 11 |
| 1959 | The DuPont Show with June AllysonSeries | Pepe | 11 |
| 1959 | Philip MarloweSeries | — | 11 |
| 1959 | The Jazz SingerMovie | Larry | 11 |
| 1957 | Leave It to BeaverSeries | — | 9 |
| 1957 | Richard Diamond, Private DetectiveSeries | Tommy | 9 |
| 1956 | The Girl Can't Help ItMovie | Barry the Paperboy | 8 |
| 1955 | Alfred Hitchcock PresentsSeries | Ignace 'Iggy' Kovacs | 7 |
| 1953 | General Electric TheaterSeries | Etienne | 5 |
| 1953 | The Danny Thomas ShowSeries | Herbie | 5 |