The Haunted Horseman of Hagglethorn Hall To rejuvenate the tourism that's dropped off since the rumors of ghosts have circulated, the gang helps former-Monkee Davy Jones prove that the Horseman of his Hagglethorn Hall is a phony. Details Casts Galleries Posters Season Lists Title The Haunted Horseman of Hagglethorn Hall Genres Animation Mystery Comedy Kids Family Release Date 1972-12-02 Episode Runtime 00 Hours 40 Minutes Season Number 1 Episode Number 13 Production Companies Hanna-Barbera Productions Don Messick... Scooby-Doo (voice)... Casey Kasem... Shaggy (voice)... Frank Welker... Fred Jones (voice)... Nicole Jaffe... Velma (voice)... Heather North... Daphne (voice)... Original Size (3840x2160) Original Size (1920x1080) Original Size (2000x1125) Original Size (2000x1125) Original Size (1448x814) Original Size (2000x3000) Original Size (960x1440) Original Size (2000x3000) Season 1 16 Episode(s) 1972-09-09 Season 2 8 Episode(s) 1973-09-08