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?
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.
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.
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.
Arthur Manchester investigates a mole in the ranks, and the Volm seek assistance in destroying a power source for Espheni weapons.
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.