One wonders what an actor with the impeccable taste of Johnny Depp was doing accepting the lead in this unconvincing psychological thriller. Playing an astronaut (ludicrously named Spencer Armacost) who starts behaving oddly after an accident in space, Depp brings an undeserved degree of credibility to what is a derivative and unshocking sci-fi rehash of Rosemary's Baby (with a dash of Species II thrown in for bad measure). Charlize Theron reheats her spouse-going-mental role from The Devil's Advocate, a film that at least allowed itself a degree of camp - this is too serious for its own good, and no amount of inventive direction from the debuting Rand Ravich can save it.

When astronaut Spencer Armacost returns to Earth after a mission that nearly cost him his life, he decides to take a desk job in order to see his beautiful wife, Jillian, more often. Gradually, Jillian notices that Spencer's personality seems to have changed, but her concerns fade when she discovers that she's pregnant. As Jillian grows closer to becoming a mother, her suspicions about Spencer return. Why does it seem as if he's a different person?