After freeing Matt from the Espheni Youth Camp, Tom encounters two mysterious strangers in the woods, who attack his family before embarking with him on a violent journey. Hal faces almost insurmountable odds as he tries to lead the remaining Volm and 2nd Mass to a place of perceived safety. Lexi and Anne have a difference of opinions – resulting in dangerous consequences.

Scandal hits Cardiff Electric as the team finalizes preparations for COMDEX. Meanwhile, Bosworth makes a sacrifice for the good of the PC program.

A life insurance policy complicates the investigation into a farmer's apparent murder. Branch and Cady check out a lead in Denver. Vic receives an ultimatum from Sean.

Take a look inside what life was like for the families and scientists living in the secret city of Los Alamos who were tasked with making the world's first atomic bomb.

Masters begins a new job at Memorial Hospital under Betty's extortion terms only to discover that his boss insists he leave Virginia behind in favor of a handpicked secretary. Meanwhile, Johnson is torn between pressing Masters to rehire her and staying by DePaul's side as her condition worsens.

Ray forces Mickey to return to LA and brings him to Ed Cochran, who holds a press conference taking full credit for finding and killing Sully Sullivan. However, Kate McPherson, a Boston reporter, doesn't believe the story and begins to investigate his death. In a desperate bid to control his father Ray corrupts a parole officer and has him take over Mickey's case.

With Rachel close to a breakthrough on her vaccine, she, Chandler and XO Slattery lead a small team into the jungles of Nicaragua on a mission to find monkeys for her vaccine trials. While there, they find much more than they bargained for when they run across a former drug kingpin who will stop at nothing to maintain his stranglehold on his oppressed society. Chandler and his men find themselves in a huge moral dilemma over whether to eliminate this menace or take what they need and continue on with their mission.

A holiday display goes wanting, sending Kevin scurrying to find out who is responsible. Tom and Christine run into trouble at a hospital and on the road. Kevin retrieves a surprise detainee from a neighboring police station, and receives some unexpected visitors at home. The Guilty Remnant puts their stamp on the holiday season.

A dystopian future is driven by a global fertility crisis. In the opener, Dr. Alison Lennon fertilizes 100 eggs and convinces the president to hold a national lottery to see who will carry the prized embryos to term. Unfortunately, a battle over the control of the embryos begins.

The four survivors begin manifesting strange symptoms, but Eph and Nora's attempt to quarantine them is thwarted as the disinformation campaign begins. Setrakian receives a surprise visit from an old – a very old – acquaintance.

Ingrid prepares to move out while Freya tracks down Killian. Dash discovers the identity of his blackmailer and plans revenge. Wendy and Joanna follow Frederick to figure out what his motives are since reconnecting with the family.