PSP Movies - Riddick (Vin Diesel) has been outrunning the price on his head, planet-hopping through the farthest reaches of the galaxy. He finds himself a fugitive on Helion Prime, the home world of a culturally advanced society. The evil Lord Marshal has invaded Helion, and is using his army of Necromongers to subjugate and convert the humans. Riddick is exiled to an underground prison, frozen by night and burning with volcanic heat by day. In this asylum he is reunited with Kyra (Alexa Davalos), a survivor from his past. Together, Riddick and Kyra mount an escape, which leads them to the Necromonger Mothership. Lord Marshal and Riddick clash, and their forces do battle in a fateful climax where the future of both the dead and living will be decided!