Credits

• 2024 · Space Command Redemption as Greg Mazzey
• 2023 · Babylon 5: The Road Home as Lennier (voice)
• 2018 · What We Left Behind: Looking Back at Star Trek: Deep Space Nine as Self
• 2018 · Lost in Space as Dr. Zachary Smith
• 2018 · Lost in Space as Real Dr. Smith
• 2012 · Bravest Warriors as Ralph Waldo Pickle Chips
• 2010 · Ben 10: Ultimate Alien as Agent Bryson (voice)
• 2009 · The Face Is Familiar as Narrator
• 2007 · Holly Hobbie and Friends: Surprise Party as Bud Morris (voice)
• 2006 · Holly Hobbie and Friends: Christmas Wishes as Bud Morris / Judge #1 (voice)
• 2006 · A.I. Assault as Major Keith
• 2006 · Look, Up in the Sky! The Amazing Story of Superman as Self
• 2006 · Holly Hobbie & Friends as Bud Morris (voice)
• 2005 · Derailroaded as Self
• 2005 · Ringers: Lord of the Fans as Self
• 2002 · The Twilight Zone as Anthony Fremont
• 2002 · What's New, Scooby-Doo? as Harry Noze (voice)
• 2002 · Larry 'Wild Man' Fischer as Self
• 2001 · Crossing Jordan as Paper Shredder Operator
• 2001 · TVography as
• 2000 · Buzz Lightyear of Star Command as Eon (voice)
• 2000 · Behind The Dementia as himself
• 1999 · Attack of the 50 Foot Monster Mania as Narrator
• 1998 · Lost In Space Forever as Self (also archive footage)
• 1997 · The Weird Al Show as
• 1996 · The Monkey Prince as Sam (voice)
• 1996 · Underground Adventure as Sam (voice)
• 1996 · Space Cases as
• 1995 · Three Wishes as Neighbor
• 1994 · The Steven Banks Show as Billy Mumy
• 1994 · Space Ghost Coast to Coast as
• 1994 · Babylon 5 as Lennier
• 1993 · Diagnosis: Murder as Parker Craddick
• 1993 · Star Trek: Deep Space Nine as Kellin
• 1992 · Batman: The Animated Series as The Fox (voice)
• 1992 · Double Trouble as Bob
• 1991 · The Ren & Stimpy Show as
• 1990 · Captain America as Young General Fleming
• 1990 · The Flash as Roger Braintree
• 1988 · Superboy as
• 1986 · Matlock as
• 1985 · The New Alfred Hitchcock Presents as Supermarket Clerk
• 1984 · Hard to Hold as The James Roberts Band - Keyboard
• 1983 · Twilight Zone: The Movie as Tim
• 1977 · Sunshine Christmas as Weaver
• 1975 · Sunshine as Weaver
• 1974 · The Rockford Files as Trask
• 1974 · The Rockford Files as Nick Butler
• 1973 · Papillon as Lariot
• 1973 · Sunshine as Weaver
• 1971 · Bless the Beasts & Children as Lawrence Teft
• 1969 · Rascal as Sterling North
• 1968 · Lancer as
• 1968 · Wild in the Streets as Boy
• 1965 · I Dream of Jeannie as Custer
• 1965 · Lost in Space as Will Robinson
• 1965 · Dear Brigitte as Erasmus 'Ras' Leaf
• 1965 · Lost in Space - No Place to Hide as Will Robinson
• 1964 · The Munsters as
• 1964 · Bewitched as Michael
• 1964 · For the Love of Willadean as Freddy Gray
• 1963 · Palm Springs Weekend as Boom Boom Yates
• 1963 · The Fugitive as David Taft
• 1963 · The Greatest Show on Earth as
• 1963 · A Ticklish Affair as Alex Martin
• 1963 · Vacation Playhouse as Chris Williams
• 1963 · A Child Is Waiting as Child
• 1962 · Sammy, the Way-Out Seal as Petey Loomis
• 1962 · The Eleventh Hour as
• 1962 · Going My Way as
• 1962 · The Alfred Hitchcock Hour as Tony Mitchell
• 1962 · The Virginian as Willy
• 1961 · Ben Casey as
• 1961 · Dr. Kildare as Jeffey
• 1961 · Tammy Tell Me True as Neil Bateman
• 1961 · Kraft Mystery Theatre as
• 1961 · The Wizard of Baghdad as Aladdin
• 1960 · National Velvet as
• 1959 · The Twilight Zone as Billy Bayles
• 1959 · The Twilight Zone as Anthony Fremont
• 1959 · The Twilight Zone as Young Pip
• 1957 · Perry Mason as Miles
• 1957 · Wagon Train as Toddy
• 1955 · Alfred Hitchcock Presents as Mickey Hollins
• 1955 · Alfred Hitchcock Presents as Jackie Chester
• 1954 · Walt Disney's Wonderful World of Color as Freddy Gray
• 1954 · Walt Disney's Wonderful World of Color as Petey Loomis
• 1953 · Letter to Loretta as Rennie
• 1953 · Letter to Loretta as Jimmy Harrison
• 1953 · General Electric Theater as Buzz
• 1950 · The Jack Benny Program as Little Boy Who Weighs Himself