The 2nd Mass finds refuge in a Volm hideout, but tensions with the Volm continue to rise. Meanwhile, Tom teams with Weaver and Cochise in a search for Matt, and Anne reconnects with Lexi.moreless
We find the remaining 2nd Mass outside of Charleston when they are suddenly under attack from a new Espheni threat, dangerously different from anything they have previously faced. Finding themselves separated from each other, The Masons must find ways to survive by building new friendships and acquiring new skills and abilities.moreless
An undercover cop in Danny's squad gets killed, and Frank is determined to find the murderer. However, things get complicated when the victim's secret is unearthed. Elsewhere, Nicky turns to Jamie as she looks for an ex-classmate living on the streets.moreless
Pierce helps out when an autistic teen is under investigation for murder with help from his hallucination Hall of Famer Mordecai "Three Finger" Brown. Dean Haley sets out to convince a neuroscience prodigy to attend CLMU.moreless
Pierce is sure that a psychiatric hospital is full of secrets after he investigates a stabbing there.
The second Mass' victory is short lived when they discover that the Volm plan on shipping them all off to camps in Brazil.
Tom returns safely back to the camp, angry about the death of Lexi and Anne. He comforts his sons and instructs them to use their pain for strength in avenging their deaths. Lourdes continues to sabotage the camp, but has she pushed her luck too far?moreless
Tom wakes up in a pre-invasion world.
The Picket family rob the Masons as they search for Anne and Alexis leading to a stand-off for their supplies.
The Masons are in for trouble when Hal 's intentions come to the surface.
Pierce and Moretti deal with a woman who says aliens have abducted her husband. Meanwhile, Pierce's relationship with his real-life girlfriend, Caroline, could be in trouble if he can't rid imaginary Natalie from him mind.moreless
Marina disobeys orders, Weaver searches for two missing 2nd Mass members and after a mission goes pear shaped, Tom and Pope finds themselves relying on each other to survive.
When Pierce is asked to verify the mental competency for a man being retried for murder, his findings bring up more questions. Meanwhile, Moretti's soon-to-be-ex-husband Donnie Ryan is the Assistant U.S. Attorney prosecuting the case.moreless
Another alien attack is thwarted resulting in a meeting between Tom and a powerful leader.
The mole is still at the front of everyone's minds, especially when they come under sniper fire from a young girl. Anne continues to worry about her baby.
Taking place several months after the end of last season's final episode, the 2nd Mass attempt to liberate children who are being forced to work a mine, guarded by skitters and mechs.
Arthur Manchester investigates a mole in the ranks, and the Volm seek assistance in destroying a power source for Espheni weapons.
Pierce helps investigate the death of a therapist while Moretti spends time with Hathaway. Dean Haley is fund raising for a new building.
In the Season 2 finale, the skitters draw closer to the consolidated resistance force. Elsewhere, the 2nd Mass come across their biggest threat as Tom discovers game-changing information.
Tector makes the decision to embrace his military past, while Maggie becomes suspicious that Pope will be leaving he group. The 2nd Mass continue to meet new people along the way, as Tom runs into a former untrustworthy mentor.moreless
Tom lands himself another captive andBen is lead into danger at the hand of someone he trusts. The unit faces a brand new enemy while trapped in the basement of a building.
The prime suspect in the murder of a mail-order bride suffers from a malady that leaves him unable to recognize faces. A new professor attracts Moretti's attention.
While on patrol, Hal and Maggie discover an unharnessed and alive Karen among a group of half-buried unharnessed corpses. Tom has some tough decisions to make when Weaver falls gravely ill from the bite he received at the harnessing factory.moreless
Jane and Maura are called upon to investigate the death of a financier found jammed into a trashcan. Maura makes a more meaningful connection with Dr. Hope Davis and her half-sister.
Hal and Ben have their bikes stolen while out on patrol and the hunt to retrieve them leads to the discovery of something much bigger. Matt finds himself in serious danger and Weaver rediscovers a lost family member.moreless
The 2nd Mass moves into an airport hangar but the situation gives Anne reason to worry about the health of the group. Meanwhile Pope and The Berserkers hatch a plan to deal with Tom. The group suffers a great loss but receives a promise of hope from a mysterious visitor.