| Pinocchio's Christmas | 1980 | Cricket (voice, as Robert McFadden) | TV Movie |
| I Go Pogo | 1980 | Howland Owl / Bothered Bat (voice) | Movie |
| Drawing Power | 1980 | | TV Show |
| Rudolph and Frosty's Christmas in July | 1979 | Donner (voice) | TV Movie |
| The Easter Bunny Is Comin' to Town | 1977 | Chugs (voice) | TV Movie |
| The Fourth King | 1977 | The Beaver (voice) | TV Movie |
| The Little Drummer Boy Book II | 1976 | Plato (voice) | TV Movie |
| 'Twas the Night Before Christmas | 1974 | Substation Operator / Councilmen / Handyman (voice, as Robert McFadden) | TV Movie |
| The Year Without a Santa Claus | 1974 | Jingle Bells (voice) | TV Movie |
| The Enchanted World of Danny Kaye: The Emperor's New Clothes | 1972 | Jaspar (voice, as Robert McFadden) | TV Movie |
| The ABC Saturday Superstar Movie | 1972 | Morbid Grimsby / Brutus / The President / ... | TV Show |
| Martian Moochers | 1970 | Oscar / Gadmouse (voice) | Short Film |
| Balloon Snatcher | 1969 | Oscar (voice) | Short Film |
| Scientific Sideshow | 1969 | Oscar (voice) | Short Film |
| Frog, The | 1969 | Voices (voice) | Short Film |
| Mouse Trek | 1968 | Cat (voice, uncredited) | Short Film |
| The Fuz | 1968 | Super Basher / Bop / Pinrod / ... (uncredited) | Short Film |
| Big Game Fishing | 1968 | Sad Cat (voice) | Movie |
| Grand Prix Winner | 1968 | Sad Cat / Fenimore / Letimore / ... (voice) | Short Film |
| Dribble Drabble | 1968 | | Movie |
| The Wacky World of Mother Goose | 1967 | Humpty Dumpty (voice, as Robert McFadden) | Movie |
| Robin Hoodwinked | 1967 | King / Poor Man (voice) | Short Film |
| The Squaw Path | 1967 | Geronimo / Say-Ah the Medicine Man / Foback / ... (voice, uncredited) | Short Film |
| The Stubborn Cowboy | 1967 | | Short Film |
| Abominable Mountaineers, The | 1967 | Fenimore (voice) | Short Film |
| All Teed Off | 1967 | Sad Cat / Fenimore / Lenimore (voice) | Short Film |
| Clean Sweep | 1967 | Policeman / Repairman (voice, uncredited) | Short Film |
| Judo Kudos | 1967 | Sad Cat / Fenimore / Lenimore (voice) | Short Film |
| Loops and Swoops | 1967 | Sad Cat / Fenimore / Lenimore (voice) | Short Film |
| Mighty Heroes | 1966 | Oscar / Gadmouse | TV Show |
| Cool McCool | 1966 | Cool McCool / Harry McCool / Narrator / ... | TV Show |
| Gems from Gemini | 1966 | Oscar / Gadmouse (voice) | Short Film |
| Haunted Housecleaning | 1966 | Oscar (voice) | Short Film |
| A Balmy Knight | 1966 | Sir Blur / Grandpa Dragon (uncredited) | Short Film |
| Defiant Giant, The | 1966 | George the Giant (voice, uncredited) | Short Film |
| I Want My Mummy | 1966 | Phately P. Bogus / Waiter / B.C. (voice, uncredited) | Short Film |
| Scuba Duba Do | 1966 | Fenimore (voice) | Short Film |
| Crumby Mummy | 1966 | Milton (voice) | TV Show |
| Fort Fangenstein | 1966 | Milton (voice) | TV Show |
| Sphinx Jinx | 1966 | Fearless Fly / Professor Weirdo (voice) | TV Show |
| Stage Plight | 1966 | Fearless Fly / Professor Weirdo (voice) | TV Show |
| Va-Room Service | 1966 | | TV Show |
| The Soupy Sales Hour | 1966 | | TV Movie |
| Milton the Monster | 1965 | Milton the Monster | TV Show |
| Usei shônen popi | 1965 | Hadji Baba (1965) (voice) | TV Show |
| Weather Magic | 1965 | Oscar Mild (voice, uncredited) | Short Film |
| Cagey Business | 1965 | Narrator / Lion / Zookeeper / ... (uncredited) | Short Film |
| Don't Spill the Beans | 1965 | Sad Cat / Fenimore / Letimore / ... (voice) | Short Film |
| Gadmouse the Apprentice Good Fairy | 1965 | Sad Cat / Fenimore / Letimore / ... (voice) | Short Film |
| Homer on the Range | 1965 | Homer Ranger / Captain Crabgrass / Honest Injun / ... (uncredited) | Short Film |
| Reading, Writhing, and Rithmetic | 1965 | Buck (uncredited) | Short Film |
| Solitary Refinement | 1965 | Boobie Baboon / Guard (voice, uncredited) | Short Film |
| Tally Hokum | 1965 | Narrator / Hangdog / Moxie Foxie (voice, uncredited) | Short Film |
| The Third Musketeer | 1965 | Fenimore (voice) | Short Film |
| A Tiger's Tail | 1965 | Ali Presto / Havisham / Laddy's Father (uncredited) | Short Film |
| A Leak in the Dike | 1965 | Little Dutch Boy's Mother / Schoolteacher / Farmer / ... (voice, uncredited) | Short Film |
| The Story of George Washington | 1965 | George's Father / King of England / George Washington / ... (uncredited) | Short Film |
| Dress Reversal | 1965 | Sad Cat / Letimore / Fenimore / ... (voice) | Short Film |
| A Pie in the Sky | 1965 | | TV Show |
| Spider Spiter | 1965 | | TV Show |
| Luno the White Stallion | 1965 | Luno the White Stallion / Luno / Astronut / ... | TV Show |
| The Invisibeam | 1965 | Oscar (voice) | Short Film |
| Voyage to the Bottom of the Sea | 1964 | Invader | TV Show |
| Linus! The Lion Hearted | 1964 | So-Hi / Rory Raccoon / Lovable Truly | TV Show |
| Brother from Outer Space | 1964 | Oscar Mild (uncredited) | Short Film |
| And So Tibet | 1964 | Professor Fog / Boss / Caveman (uncredited) | Short Film |
| Monstrous Task | 1964 | Fearless Fly / Professor Weirdo (voice) | TV Show |
| Good Snooze Tonight | 1963 | Sheriff / Sheep Dog (uncredited) | Short Film |
| Harry Happy | 1963 | Harry Happy / Miss Knotgrass / Marriage Counselor (voice, uncredited) | Short Film |
| Hiccup Hound | 1963 | Dog / Hunter (uncredited) | Short Film |
| Hound for Pound | 1963 | Dog / Dog Catcher / Man / ... (uncredited) | Short Film |
| The Sheepish Wolf | 1963 | Wolf / Sheriff / Sheep (uncredited) | Short Film |
| Boy Pest with Osh | 1963 | Various (voice) | TV Show |
| Fiddlin' Around | 1962 | Mac the Maestro / Insurance Manager / British Officer / ... (uncredited) | Short Film |
| Miceniks | 1961 | Cat (uncredited) | Short Film |
