Guest Stars Tom Hughes as Jonty Millingden Liam Bergin as Rupert Rod Arthur as Pete Dobkin Tara Ward voices Avalon Saif Alfalasi as Vigor David Oakes as Ross Bonham Mark Aiken as Mr. Pearce Anthony Hoskyns as Seifert Nicholas Sidi as Richard Arc Trevor Laird as Barrington MacKenzie Doreene Blackstock as Neatha MacKenzie Karen Ascoe as Mrs. Arc Uncredited Simon John Wilson as Student