Original air date: 09/25/2018 Runtime: 44:27 min. Reeva Payge purges the Inner Circle of those who disagree with her, and she emerges as their sole leader. Six months later, the remaining members of the Mutant Underground have relocated to Washington, D.C., where Sentinel Services is being even more ruthless about tracking down mutants. Desperate for answers, Eclipse and Caitlin secretly meet with criminal hacker Wire to get info on the Inner Circle. Meanwhile, Polaris prepares for the birth of her baby. Worried that all might not go as planned, she makes a secret pact with Andy.
Original air date: 10/02/2018 Runtime: 44:50 min. Thunderbird contacts a mutant lawyer who recruited him to the Underground years ago, hoping she can help him find the Inner Circle. Lauren and Andy have a shared dream, which distracts Andy from his training and prompts Reeva to consider cutting her losses with him, which, in turn, makes Andy second-guess his separation from his sister. Meanwhile, Reed must keep a huge secret from the group and Jace picks up the mutants' trail again.
Original air date: 10/09/2018 Runtime: 44:24 min. Polaris’ baby begins to suffer from a deadly illness, leaving the Inner Circle unable to heal her, and prompting them to turn to an unexpected source for help. Meanwhile, Reed and Lauren take an excursion to deliver illegal meds, but Reed’s powers complicate their plans. Then, Thunderbird and Blink meet the leader of the Morlocks – a shadowy group of mutants that live underground – who offers to help them find the Inner Circle, but the two factions may not have the same goals.
Original air date: 10/16/2018 Runtime: 44:05 min. The Struckers, minus Andy, begin to rebuild their broken trust, while Thunderbird, Blink and Eclipse visit Wire, hoping to convince him to help again. But when they get there, they learn that something terrible has happened from Wire’s brother, Graph. The team discovers that the Inner Circle is on the way to raid a mutant detention facility, so they make moves to try to intercept them. Meanwhile, Jace is contacted by a member of the Purifiers.
Original air date: 10/30/2018 Runtime: 43:40 min. As Caitlin and Thunderbird struggle to save the life of a mutant injured in the Inner Circle's chaotic liberation of a psychiatric hospital, they discover clues to the identity of the powerful mutant Polaris and Andy were sent to retrieve. Meanwhile, as Jace joins up with the Purifiers to chase down the escaped mutants, he comes dangerously close to colliding once again with the Mutant Underground.
Original air date: 11/06/2018 Runtime: 44:03 min. The Inner Circle prepares for a secret ambush, but Polaris is reluctant to join and Reeva tasks Esme with getting Polaris on board. Esme confides in Polaris, revealing her and her sisters’ troublesome past. Meanwhile, Thunderbird trains Reed to control his powers and The Purifiers attack The Mutant Underground as they attempt to rescue a group of homeless mutants.
Original air date: 11/13/2018 Runtime: 44:44 min. Reeva reveals her plans for a major mission for the Inner Circle to secure some needed funds. Meanwhile, the Mutant Underground must contend with Reed's unstable powers, hoping that some medical help from Caitlin and Lauren will keep his destruction in check. Also, Jace is introduced to Benedict Ryan, a well-connected public figure who supports the efforts of the Purifers, but the two may not see eye-to-eye. Then, Thunderbird finally confronts Blink about her dealings with Erg, after weeks of tension over their meeting.