Bill Mumy is an American film and television actor.
| Movie | Space Command Redemption | Greg Mazzey | 2024-03-09 |
| Series | Lost in Space | Real Dr. Smith | 2018-04-13 |
| Movie | What We Left Behind: Looking Back at Star Trek: Deep Space Nine | Self | 2018-10-12 |
| Series | Bravest Warriors | Ralph Waldo Pickle Chips | 2012-11-08 |
| Movie | The Face is Familiar | Narrator | 2009-06-08 |
| Movie | Look, Up in the Sky! The Amazing Story of Superman | Self | 2006-06-12 |
| Movie | A.I. Assault | Major Keith | 2006-09-11 |
| Movie | Ringers: Lord of the Fans | Self | 2005-01-21 |
| Movie | Derailroaded | Self | 2005-03-01 |
| Movie | Comic Book: The Movie | Bill Mumy | 2004-01-27 |
| Series | What's New, Scooby-Doo? | Unknown | 2002-09-14 |
| Series | The Twilight Zone | Unknown | 2002-09-18 |
| Series | TVography | 2001-09-02 | |
| Series | Crossing Jordan | Unknown | 2001-09-24 |
| Movie | Behind the Dementia | himself | 2000-05-20 |
| Movie | Attack of the 50 Foot Monster Mania | Narrator | 1999-01-01 |
| Movie | Lost In Space Forever | Self (also archive footage) | 1998-01-01 |
| Series | The Weird Al Show | Unknown | 1997-09-13 |
| Movie | Underground Adventure | Sam (voice) | 1996-09-28 |
| Movie | Three Wishes | Neighbor | 1995-10-27 |
| Series | Babylon 5 | Lennier | 1994-01-26 |
| Series | Space Ghost Coast to Coast | Unknown | 1994-04-15 |
| Series | Diagnosis: Murder | Unknown | 1993-10-29 |
| Movie | Double Trouble | Bob | 1992-02-14 |
| Series | The Ren & Stimpy Show | Unknown | 1991-08-11 |
| Movie | Captain America | Young General Fleming | 1990-12-14 |
| Series | The Flash | Unknown | 1990-09-20 |
| Series | Superboy | Unknown | 1988-10-08 |
| Series | Matlock | Unknown | 1986-03-03 |
| Series | The New Alfred Hitchcock Presents | Unknown | 1985-09-29 |
| Movie | Hard to Hold | The James Roberts Band - Keyboard | 1984-06-28 |
| Movie | Twilight Zone: The Movie | Tim | 1983-06-24 |
| Movie | Sunshine Christmas | Weaver | 1977-12-12 |
| Series | Sunshine | Weaver | 1975-03-06 |
| Series | The Rockford Files | Trask | 1974-09-13 |
| Movie | Sunshine | Weaver | 1973-11-09 |
| Movie | Papillon | Lariot | 1973-12-16 |
| Movie | Bless the Beasts & Children | Lawrence Teft | 1971-08-01 |
| Movie | Rascal | Sterling North | 1969-06-11 |
| Movie | Wild in the Streets | Boy (uncredited) | 1968-05-29 |
| Series | Lancer | Unknown | 1968-09-24 |
| Movie | Dear Brigitte | Erasmus 'Ras' Leaf | 1965-01-08 |
| Series | I Dream of Jeannie | Unknown | 1965-09-18 |
| Series | Lost in Space | Will Robinson | 1965-09-15 |
| Movie | For the Love of Willadean | Freddy Gray | 1964-03-08 |
| Series | Bewitched | Unknown | 1964-09-17 |
| Series | The Munsters | Unknown | 1964-09-24 |
| Series | Vacation Playhouse | Unknown | 1963-07-22 |
| Movie | A Child Is Waiting | Child | 1963-02-13 |
| Movie | A Ticklish Affair | Alex Martin | 1963-08-18 |
| Series | The Greatest Show on Earth | Unknown | 1963-09-17 |
| Movie | Palm Springs Weekend | Boom Boom Yates | 1963-11-05 |
| Series | The Fugitive | Unknown | 1963-09-17 |
| Series | The Virginian | Unknown | 1962-09-19 |
| Series | Going My Way | Unknown | 1962-10-03 |
| Series | The Eleventh Hour | Unknown | 1962-10-03 |
| Movie | Sammy, the Way-Out Seal | Petey Loomis | 1962-10-28 |
| Movie | The Wizard of Baghdad | Aladdin | 1961-03-03 |
| Series | Kraft Mystery Theatre | Unknown | 1961-06-14 |
| Series | Dr. Kildare | Unknown | 1961-09-27 |
| Movie | Tammy Tell Me True | Neil Bateman | 1961-07-26 |
| Series | Ben Casey | Unknown | 1961-10-02 |
| Series | National Velvet | Unknown | 1960-09-18 |
| Series | The Twilight Zone | Unknown | 1959-10-02 |
| Series | Perry Mason | Unknown | 1957-09-21 |
| Series | Alfred Hitchcock Presents | Unknown | 1955-10-02 |
| Series | General Electric Theater | Unknown | 1953-02-01 |
| Series | Letter to Loretta | Unknown | 1953-09-20 |