WARNING: If you don't want to know what happens in this episode, don't read this photo recap!

If Regan went willingly with Musa (aka Brother Number Four) at the end of last week's episode, she's not feeling so willingly now. He's got her in chains with only a bunny to keep her company ... uh-oh.

Musa wants to save Regan from her humanity. Embrace those Hunter urges, woman!

Musa hands Regan over to Abby, who seems to have survived her gunshot wound from back at the hotel just fine. Abby puts Regan through the Hunters' clarification/dehumanization/brainwashing process, which involves being submerged in Hunter blood. A flashback reveals that Abby went through the same process after being kidnapped by McCarthy.

Back at the ETU, Flynn accuses Briggs of lying to Finnerman to make it look like Regan was in cahoots with Musa. Does Briggs really think that Regan is the mole ... or is he covering his own ass?

Flynn and Jules find a SIM card that Briggs used to call only one number no less than 14 times: McCarthy's! So is Briggs the mole ...?

Briggs accuses Flynn of planting evidence that he himself would never leave behind. Jules is the one who ran the diagnostic on the SIM card ... wait a minute ... Jules!

Yep, it would appear that Jules is the mole. He's left a message denouncing the ETU's 'inhumane' treatment of the Hunters.

Meanwhile, Jackson meets with Hagi, a former CIA colleague who was an arms supplier for Musa. Hagi tells Jackson that, once upon a time, Musa was also interested in purchasing a lithium mine (lithium happens to be a raw material for thermonuclear weapons, so, you know, red flag).

Jackson discovers a lithium mine, Devil's Tower Mining, the address of which is actually an abandoned hospital ... and located just eight miles from Regan's childhood home. Could Regan's Hunter parents have been the proprietors ... and, more importantly, is that where Musa is holding Regan? The ETU prepares to raid the hospital.

After a few intense sessions with Abby, Regan seems to be coming around. During a nice steak dinner, Musa tells her that he doesn't know what happened to her parents ... but the ETU does.

Musa tells Regan the Hunters' origin story. They come from a war-torn world in which the enslaved rose up against their rulers. Many of the enslaved boarded a ship to find a world of their own to colonize, but the ship was sabotaged by a group known as The Exalted. A few escape pods made it to Earth.

After dinner, Abby and Regan get intimate at a crazy Hunter orgy. Embrace those Hunter urges, ladies!

Meanwhile, Jules has fled to a predetermined 'meeting point' now that the ETU is on to him. We would not want to run into The Quins in a deserted parking lot, but that's exactly what happens to our dear mole.

In the forest near the Devil's Tower lithium mine, a terrified Jules is surrounded. Hunters have no patience for moles who blow their cover.

It would appear that, encouraged by Abby, Regan finishes the job on Jules via a Hunter's blade ... a seemingly final renunciation of her humanity. Ouch.

The ETU raids the abandoned hospital, where they find evidence of Regan's recent 'treatment' ... but no signs of Musa or any of the Hunters.

Outside, Jackson and company find Jules' mutilated body. Good night, mole.

Regan summons Jackson to his house and tells him that she "got away" from Musa. Can she be trusted?