Scooby's Roots Scooby's relatives have the ghosts of their ancestors in their mansion. Details Casts Galleries Posters Season Lists Title Scooby's Roots Genres Animation Mystery Comedy Family Kids Release Date 1981-09-19 Episode Runtime 00 Hours 30 Minutes Season Number 3 Episode Number 3 Production Companies Hanna-Barbera Productions, Ruby-Spears Enterprises Casey Kasem... Shaggy Rogers (voice)... Don Messick... Scooby-Doo / Scrappy-Doo ... Original Size (1920x1080) Original Size (1920x1080) Original Size (2000x3000) Original Size (960x1440) Original Size (1000x1426) Original Size (600x900) Original Size (600x900) Season 1 16 Episode(s) 1979-09-22 Season 2 39 Episode(s) 1980-11-08 Season 3 21 Episode(s) 1981-09-19 Season 4 39 Episode(s) 1982-09-25