Trama e commenti: cinematografo.it - mymovies.it - film.spettacolo.virgilio.it - kataweb.it: «Per conquistare il trono di Cornovaglia il mago Pendragon si serve di una serie di mostri. Il giovane Jack si fa aiutare da uno gnomo per ostacolarlo. Film che ha lo stile giusto e l'atmosfera magica della favola. Di buon livello la recitazione, alacre il ritmo ed eccellenti gli effetti speciali».

Plot Summary, Synopsis, Review: IMDb - entertainment.msn.com - tvguide.com - rottentomatoes.com: «A stunning version of the tale that includes witches, dragons and sea monsters, this film introduced Fantascope's special effects photography that enabled animated puppets to add dimension and be combined with live action for the first time. An outstanding children's fantasy from the era... A stunning version of the tale that includes witches, dragons and sea monsters, this film introduced Fantascope's special effects photography that enabled animated puppets to add dimension and be combined with live action for the first time. An outstanding children's fantasy from the era that also brought the best work of Ray Harryhausen, the special effects master whose influence is evident here...».

Approfondimenti: Movie Review