Welcome to the wonderful world of the independent, cut-price horror, science fiction and fantasy movie. Movies where most of the aliens are, well, for want of a better word, Alien rip-offs; where the leading men and women display all the emotions of cardboard cut-outs; where decent music is more or less non-existent; where direction veers from the truly sublime to the utterly ridiculous; where plots are ruthlessly plagiarized from other, more high-profile...