With deaths piling up, the guards are forced to unite with the patients to fend off the attackers. Montes questions Hugo's judgment.

Just as the assailants close in on the Red Block, Hugo makes a last-ditch effort to fight back and save his kidnapped daughter, Laura.

Montes and Hugo face off over Simón. Manuela makes a surprising accusation against Espada and begs Cherokee to retaliate on her behalf.

Ruso and his group attempt to find another way to infiltrate Baruca. The patients start acting up and get suspicious they aren't being told the truth.

As the attackers make progress on the Green Block's door, Cherokee stages a revolt in Red Block and Hugo's kids are used as leverage.

When serial killer Simón is captured and brought to a psychiatric prison, he disrupts the warden's Christmas Eve plans. But that's only the beginning.