Halo is based on the hit xBox video game and centers on aliens threatening human existence in an epic 26th-century showdown. Halo stars Pablo Schreiber as Master Chief, Shabana Azmi, Natasha Culzac, Olive Gray, Yerin Ha, Bentley Kalu, Kate Kennedy, Charlie Murphy, Danny Sapani, Jen Taylor, Natascha McElhone, Bokeem Woodbine, Ryan McParland, Casper Knopf, Burn Gorman, Duncan Pow, Hans Peterson, Julian Bleach and Fiona O’Shaughnessy.