The Masons and the 2nd Mass order come under a brutal attack from a Espheni war machine. The Masons soon realize they need to build new relationships and work on their survival techniques.
Tom finds out what the Espheni plan is and is faced with making an impossible decision. Weaver and Pope try and escape from the Espheni prison. Matt tries to hide who he's working for and against. Anne looks for her daughter.
Tom and the 2nd Mass try to come up with an escape plan.
Tom and 2nd Mass look for refuge. Tom leads Weaver and Cochise to find Matt.
Tom runs into some strangers in the woods. Hal tries to lead the remaining survivors from Volm and 2nd Mass.
Tom gets back together with his family and the 2nd Mass. Lexi has a health crisis.
Lexi becomes more powerful then before. Tom and the rest of the 2nd mass work together alongside the Volm to try and hold off the invading forces.
Maggie is left fighting for her life after an alien attack. Tom and Dingaan's only hope of survival is relying on an enemy ship.
Tom follows the Volm in an effort to find equipment to work on a crippled airship. Maggie and Ben grow closer at camp while Pope and Sara fall out.
Tom and the 2nd mass discover how to pilot a Beamer, as part of the plan to destroy the power core. The threat of death leads to confrontations within the group.
Lexi has to save her father's life. Lexi's return leaves complications for Tom's mission.
Espheni power core must be destroyed - Tom and Lexi are looking for a solution.