Arthur Young

Sydney considers leaving the agency, Sloane kidnaps a scientist to help him piece together the mysterious Rambaldi device, and Dixon's wife learns the truth about his occupation.

Sydney defies her father to rescue a kidnapped scientist, Francie uses an unsuspecting Will for his agency connections, and Sloane grows increasingly dangerous.

In the middle of the hurricane chaos, Underlay and Russell mount a rescue bid to free the humans captured by the hybrids, but two humans who suspect that Underlay is the cause of the chaos take Larkin, Dave, Jesse and Rose as hostages.