Acting

2023

1 episode as (archive footage)

2018

19 episodes

2011

1 episode

2010		Regular Show 1 episode as Vocalist (voice) (uncredited)
2010		Scooby-Doo! Mystery Incorporated 5 episodes as Colton Rogers (voice)

2006		The Early Show 1 episode
2006		Shaggy & Scooby-Doo Get a Clue! 26 episodes as Uncle Albert (voice)
2006		Web Junk 20 2 episodes

2002		What's New, Scooby-Doo? 42 episodes as Shaggy Rogers (voice)
2002		MADtv 1 episode as (voice: credit only)

1997		Johnny Bravo 1 episode as Shaggy Rogers (voice)
1997		E! True Hollywood Story 1 episode

1996

1 episode as Casey Kasem

1993

1 episode as Self - Cameo (uncredited)

1992

2 episodes

1991

1 episode as Flakey Flakem (voice)

1990

1 episode as Himself

1989

2 episodes as Casey Kasem

1988

30 episodes as Shaggy Rogers (voice)

1985		George Burns Comedy Week 1 episode
1985		The Super Powers Team: Galactic Guardians 10 episodes as Robin (voice)
1985		The 13 Ghosts of Scooby-Doo 13 episodes as Shaggy Rogers (voice)

1984		Super Friends: The Legendary Super Powers Show 1 episode
1984		The Transformers 92 episodes as Cliffjumper / Bluestreak / Teletraan 1
1984		The New Scooby-Doo Mysteries 26 episodes as Shaggy Rogers (voice)

1983		Matt Houston 1 episode
1983		The New Scooby and Scrappy-Doo Show 52 episodes as Shaggy Rogers (voice)

1982

13 episodes as Shaggy Rogers

1981

66 episodes as Announcer (voice)

1980		The Richie Rich/Scooby-Doo Show and Scrappy Too! 21 episodes as Shaggy Rogers (voice)
1980		America's Top 10 20 episodes as Host
1980		Captain Caveman and the Teen Angels 16 episodes as (voice)

1979		The World's Greatest Super Friends 8 episodes
1979		Scooby-Doo and Scrappy-Doo 115 episodes as Shaggy Rogers (voice)

1978		Charlie's Angels 1 episode as Tom Rogers
1978		Battle of the Planets 85 episodes as Mark (voice)
1978		Challenge of the Super Friends 32 episodes

1977		What's New, Mr. Magoo? 1 episode as Additional Voices (voice)
1977		Switch 1 episode as Tony Brock
1977		The Hardy Boys / Nancy Drew Mysteries 1 episode
1977		The All-New Super Friends Hour 60 episodes
1977		Scooby's Laff-A Lympics 94 episodes as Shaggy Rogers (voice)
1977		Quincy, M.E. 1 episode as Sy Wallace
1977		Police Story 1 episode

1976		The Scooby-Doo Show 40 episodes as Shaggy Rogers
1976		The Scooby-Doo/Dynomutt Hour 32 episodes as Shaggy Rogers / Additional Voices (voice)

1974		Ironside 1 episode
1974		Hawaii Five-O 1 episode as Larry Swift 1 episode as Freddie Dryden
1974		Hong Kong Phooey 31 episodes

1973

109 episodes as Robin (voice)

1972		The New Scooby-Doo Movies 24 episodes as Shaggy (voice)
1972		Josie and the Pussycats in Outer Space 16 episodes as Alexander Cabot III (voice)

1970

16 episodes as Alexander Cabot III (voice)

1969		Scooby-Doo, Where Are You! 41 episodes as Shaggy Rogers (voice)
1969		Hot Wheels 32 episodes as Dexter Carter (voice)
1969		Cattanooga Cats 101 episodes as Groove

1968		The Adventures of Batman 34 episodes as Robin / Chief O'Hara (voice)
1968		Garrison's Gorillas 1 episode

Creator

1980

… Creator

Production

1980

20 episodes … Producer