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The search for a killer lands June back in Hegarty's orbit, who has a proposition for her: Join his intelligence operation to find her man.

Hegarty brings June into his plan to use Billy as an undercover asset. June's home life starts to unravel.

With Billy embedded in Cosmo Thompson's far-right group, Operation Samphire is underway. A key piece of evidence in June's case surfaces.

June appeals to the victim's mother to help combat the vicious rumors spread by Cosmo and his followers.

Hegarty continues the hunt for the detonators. June comes to a shocking realization. Cosmo's off-the-grid boot camp takes a deadly turn.

After the chaos in the woods, Billy goes dark and Operation Samphire hangs by a thread.

June is calling the shots now, as the team gets information about Cosmo's next move.

June and Hegarty must work together to stop the danger already set in motion.