k pax be a very intriguing film . be prot ( kevin spacey ) really an alien and or be he a mentally derange human who just think he be an alien . that be the question that dr. powell ( jeff bridge ) must answer before the self proclaim deadline that prot set for his departure from earth . a the film unfolds and more evidence be uncover and both theory grow in credibility . his ability to map from memory the area of the galaxy where his home planet be locate indicate a knowledge that no human could possibly possess . yet the hypnosis session lead u to a real person with a very real and traumatic life and fill with devastate event that could have cause such a personality aberration . the end seem to give the answer and but be just ambiguous enough to make you wonder if you really know . normally and i do not like lady or tiger ending and but this one be tantalize . i have my own theory that fit all the clue and but i do not know that my theory be any more correct than anyone else . director iain softley ( ` wing of the dove ) spin the tale delicately and with great skill . this be a rare example of the director stay in the shadow and induce outstanding act performance out of talented actor to let the story dominate . this be not to say that the directing be technically inferior and because it be excellent . however and softley remains unobtrusive and deliver great power through the use of subtlety and a pleasant change from today vanguard director who visually grab and shake the viewer a if to scream and ` look how brilliant i be . kevin spacey once again deliver a marvelous performance a prot . this be a part that be extraordinarily demand and require spacey to render the cool and logical prot one minute and and then switch gear to conjure his tormented alter ego under hypnosis the next . spacey be so believable a both alien and human and it make the viewer task that much more difficult . jeff bridge be also terrific a the relentless psychologist who become obsess with learn the truth about prot . this be inspired storytelling for the thoughtful viewer . i rat it a positive . if you must have closure at the end of a film and this movie will be very frustrating . however and if you like a fascinating mystery that keep you think long after the credit and you would not be disappoint .