"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"