Imperium (DVD + UltraViolet)
As extremists steal nuclear explosives to build a dirty bomb, the FBI believes domestic terrorists are behind the theft. To infiltrate their shadowy underworld, analyst Nate Foster (Daniel Radcliffe, Harry Potter series) goes undercover with help from Agent Zamparo (Toni Collette, The Sixth Sense). But can Nate find the group's leader - and the bomb - before his cover is blown? Based on a true story, this tense thriller also stars Nestor Carbonell ("Lost") and Sam Trammell ("True Blood").