The 2nd Mass destroys a crucial Espheni base; the Mason family is reunited with those who had been lost; the fate of the Earth’s remaining survivors is put in doubt by the arrival of more interstellar players.
A family of outlaws intercepts the Masons on their rescue mission; doubts over the construction of an alien weapon ignite a conflict of interests; an investigation to apprehend a killer hits a road block.
The 2-year anniversary of the alien invasion approaches; a sniper attack creates questions and doubts within the new government; Hal thinks he knows the identity of the mole; Anne’s concern for her baby continues to grow.
Tom enlists a nuclear specialist to come up with a plan that will strip the aliens of their power; Tom and the leaders make a decision that jeopardizes trust among the group; Anne suspects that something is wrong with her newborn.
The 2nd Mass encounters new people as Tom happens upon his former mentor, yet trust issues abound. Meanwhile, Maggie suspects that Pope will soon exit from the group; and Tector embraces his military past.
The unit marches onward to Charleston, S.C., as some in the group continue to grieve recent losses. Meanwhile, information surfaces about Tector’s past; and Matt connects with a recently discovered harnessed girl.