I watched this movie yesterday, it was aired by an Italian network. As an ancient reader of Three Investigators novels...what to say ? Something didn't work, in my opinion. What ? Chiefly the depiction of Pete and Bob characters. In the movie the authors made them muddlers, goofy and for what concerns Pete in particular, too much frightful. In a word, the movie shows comical personas...you don't find anything similar in books, where the humour is 'between the lines' and almost completely limited to Jupe's meetings with Hitchcock. Speaking of Jupe, I don't know, maybe it's just me, but reading novels I never imagined him always so frowned and pensive. Besides these considerations, the movie is not bad at all and can be viewed, but surely it will be enjoyed, as it was already remarked, more by young viewers than old readers.