The Mutant Underground rescues a girl from a Sentinel raid, but fails to save her family; Eclipse and Caitlin get info on the Inner Circle with help from a criminal hacker; Polaris prepares for her baby's birth.

Thunderbird hopes a mutant lawyer who recruited him to the Underground can help find the Inner Circle; Andy and Lauren have a shared dream; Reed must keep a secret from the group; Jace is back on the mutants' trail.

The Inner Circle turns to an unexpected source for help when Polaris' baby suffers from a deadly illness.

The team tries to intercept the Inner Circle, who are about to raid a mutant detention facility.

Tensions are rising within the Inner Circle as Andy defends Rebecca against Reeva's treatment. Lauren tries to convince her parents to destroy Dr. Risman's research. A frustrated Jace works with the Purifiers.

The Mutant Underground wrestles with the idea of recruiting the Inner Circle to assist them. Andy considers reconnecting with his family when he learns about his father's powers.

With the nation divided more than ever, Evangeline proposes a country-wide meeting to revive the Mutant Underground.

Reeva prepares to carry out her plan for the Inner Circle, but not everyone is on the same page.