Unfortunately, this one constituted another gaffe within my ongoing Halloween challenge since it's not really a horror film despite title, director (he'd later make the gory PIECES [1983]) and presence of genre icons Peter Cushing and Paul Naschy! In fact, it's a typical Jules Verne adventure (based on his much-filmed "Mysterious Island") which proves surprisingly palatable – thanks also to a lively score – though unbalanced by comedy relief from the youthful hero's bumbling/cowardly sidekick, a Professor of Elocution whose name is constantly mispronounced ("T. Artelet not tartlet!").

Cushing is the protagonist's rich uncle who has purchased an island, to which the boy is sent and where he meets a variety of dangers (pirates, cannibals, monsters) – eventually, there's a twist with respect to most of these, which thankfully explains the sheer poverty of the creatures on display! On the other hand, Naschy has a very small role at the start as a man who has struck gold – which is then coveted by his associates. The latter include Terence Stamp who, for obvious reasons, was Cushing's chief rival for the acquisition of the island; later on, he turns up on it (ludicrously shrouded from top to bottom complete with anachronistic goggles!) with his bandit horde to take the gold by force – to this end, he even plants a female 'shipwreck victim' to lure the hero into divulging the loot's whereabouts.

Coupled with the far better GORILLA AT LARGE (1954; see above) on Fox's-by-way-of-MGM "Midnite Movies" banner, it offers the film both in English and Spanish. At first, always the stickler for a film's native country being its original language, I started watching the film in Spanish but when a narrator began translating the credits into Spanish and the English subtitles proved to be of the descriptive "hard of hearing" variety, I soon gave up my puritan pretensions and watched it with the more 'user friendly' English soundtrack on. At least, one does get to hear Cushing and Stamp reciting their own lines this way...

Mr Kolderup (Peter Cushing) buys a tropical island for five million dollars. His rival Taskinar (Terence Stamp) also wanted the island - because he knows a gold treasure is hidden there. Still he couldn't make a higher bid than Kolderup. When Kolderup sends young Jeff (Ian Sera) to the island along with his teacher (David Hatton), because the lad looks for adventure, wants to become a man et cetera, Taskinar plans to make that adventure much more dangerous than intended...

Well, it's innocent fun with the typical ingredients: shipwrecked on a mysterious island, the heroes meet monsters and unknown enemies, a beautiful lady in distress, and last not least a monkey for comic relief. "Mystery On Monster Island" is not among the classics of the genre, but definitely less boring than most stuff they show on TV in the afternoon.

Adventure tale full of colorful scenarios , thrills , humor and pretty fierce monsters . Amusing , lighthearted romp though average , only for kids and teenagers , based upon the Jules Verne novel . It's a mediocre fun with naive special effects , passable set decoration and functional art direction without use of computer generator . It deals with a young European (Ian Sera) residing in San Francisco is reluctant to marry his long-term bride (Ana Obregon) because he wishes to travel around the world first . His wealthy uncle (Peter Cushing) agrees to send him on a global expedition aboard his vessel . He along with a professor (David Hatton) undergo a hazardous voyage but en route the young man and his traveling companion are shipwrecked on a far island loaded with rare creatures and gold . Along the way they face numerous dangers , risks as the duo descend into deep caverns and discover a tunnel system populated by countless prehistoric creatures as well as gold-hunting natives , torrential floods , volcanic eruptions and many other things . It results to be a silly but likable Spanish adaptation based on Jules Verne classic novel .

This below average humdrum adaptation is a special version of the Jules Verne adventure yarn titled ¨L'Ile Mysterieuse" or "The Mysterious Island" it was written in 1874, though the source of this picture is actually "L'École des Robinsons" or "The Robinson School" published in 1882 . There're rip-roaring action , spirit of adventure , derring-do , humor , thrills and results to be briefly entertaining . Two greatest stars of this production , Peter Cushing and Terence Stamp , are really wasted . There appears usual secondary actors seen in co-productions of the 60s and 70s , Spaghetti and Terror genre , as Frank Braña , Luis Barboo , Gerard Tichy and the horror idol , the great Paul Naschy or Jacinto Molina . It's a slight fun with average special effects by Emilio Ruiz Del Rio , passable set decoration , functional art direction and none use of computer generator . The rubber monsters are the real stars of this production , however being middling made , it has numerous "older technique" special effects such as matte paintings, rubber-suited monsters, uses the standard film technique of reverse-footage to create certain effects . The fable is silly and laughable , and the effects and action are regularly made . Among the most spectacular of its visuals there are some deeply shrouded caverns , several monsters roaring menacingly towards the camera and the colorful backgrounds of the lost island . Some monsters are clumsily but the movie has some good moments here and there . Some illogical parts in the argument are more than compensated for the excitement provided by the monsters, though sometimes are a little bit cheesy . Highlights of the voyage includes a roller-coaster trip , a terrifying odyssey in sailing , prehistoric beasts and many others. The motion picture is middling realized by Juan Piquer Simon . Piquer who recently passed away was a good craftsman , he owns his own studio and created and/or designed many of the simple special effects sequences you see in any of his many imaginative undertakings . Juan was expert on all kind of genres as Terror ( Slugs, Piezes , Cthulhu ) and Sci-fi (The rift , The new Extraterrestres, Supersonic man) . While his films have been universally panned by the prestigious reviewers, they have a kind of quality that must be endured to be fully appreciated .