
The movie title, Pandorum, refers to deep space pilots who suffer a mental breakdown and kill their co-pilots. As one might guess, one of the two flight crew members turns out to be mentally unstable. The details of that, I will let the viewer collect, as its the good half of the movie.
Unfortunately, crew member #2 isn't bat shit crazy, but he does get to travel into the heart of bat shit crazy, hyper-evolved space ship people country. This would be the half of the movie that sucks. There is no build up or suspense to finding out what is haunting Elysium. Within minutes of venturing out of the safe hold, crew member #2 is greeted by snarling, flesh-eating creatures. Then some ninjas come and save him. Long story short, feeding tubes with evolution juiced turned the ship's inhabitants into mutants. I couldn't make this shit up if I tried.
My suggestion is to watch this movie as the ending has a good twist, but ignore everything crew member #2 does the entire movie, including the end of the ending.