Summary:Season 2 opens with Pope seizing command of a renegade contingent within the 2nd Mass unit. Meanwhile, Tom suddenly returns to the group, but his loyalty comes into question; and Hal and Ben drift apart.

Summary:Tom is plagued by haunting memories of his time with the aliens and begins to speculate that they may have tampered with his mind. Elsewhere, Pope oversees an interview with Tom; Ben's hatred toward the skitters escalates; and scouts discover a bridge that could lead the group to safety.