A thousand years from now, Earth is under the control of towering aliens called Psychlos, who have enslaved humanity to exploit its resources. Other humans live a primitive existence in hiding within the wilderness. However, one individual (Barry Pepper) initiates an effort to liberate the planet. John Travolta and Forest Whitaker portray chief-security Psychlos characters. Based on L. Ron Hubbard’s 1982 book, “Ba…