Mental Block Twelve-year-old Donovan Mackay has four teenagers living inside his head. Their mission is to help Donovan through adventurous and unpredictable days in Greenfield Park Junior High. Details Casts Posters Season Lists Title Mental Block Genres Comedy Family First Air Date 2003-09-02 Last Air Date 2004-11-01 Episode Runtime 00 Hours 30 Minutes Total Season(s) 2 Total Episode(s) on All Seasons 26 Runtime 30 Production Companies Zone3 Erik Knudsen... Donovan Mackay... Tod Fennell... McHattie... Jodie Resther... Sparks... Justin Bradley... Skipper... Stefano Faustini... Ira... Mitchell David Rothpan... Maynard... Original Size (500x750) Season 1 13 Episode(s) 2003-09-02 Season 2 13 Episode(s) 2004-02-24