The Duncans are preparing to head to their Hamptons retreat when they get the call that London has gone into labor. The family excitedly waits for a new addition, while Orlando explains HEAT, the drug he’s invented. The family says goodbye to Lou.

The Duncans send Junior and Paris to search for a killer. HEAT is a big hit, and everyone is excited about the possibilities—except Chippy. A Duncan dies at the hands of the Zunigas.

The Duncans celebrate the new addition to their family; Consuela challenges the Duncans’ stronghold; the truth about Nevada Duncan is revealed.

There are wedding bells in the Duncans' future as Junior prepares to pop the question. Niles and Paris reunite and Donna Duncan returns to make Chippy's life miserable.

The Duncan family receive a clear message that an imminent inter-family war looms on the horizon. Sonya's husband and Elijah's boss, the incarcerated assassin Brother X, arrive.

Brother X fails to assassinate LC and Chippy. However, things are far from over, as he has accidentally captured a Duncan during the attack. Paris, London and Sasha launch a rescue mission.

Orlando vows to get revenge for Kennedy, Sasha's captors try to get information out of her, and the Duncans seek support in their war against the Brotherhood.

Returning home, Junior receives words of wisdom from a family member. As Brother X falls further into bloodlust, a new enemy lurks in the shadows.

The Duncans move in to rescue Sasha and eliminate Brother X. Consuela receives new intel on Alejandro. Sebastian makes a deal with the devil.

As his sons hunt down Brother X, LC decides Elijah's fate. Meanwhile, Billionaire Alexander Cora plots against the unsuspecting Duncans to take over HEAT.

Who is the new mystery man looking for Brother X? Billionaire Alexander Cora emerges from behind the scenes and is one step closer to replicating HEAT.

Curtis Duncan arrives at the Duncan Estate to mixed emotions from his family. Brandi is given a final warning. Alexander Cora's dissatisfaction with Sebastian has dire consequences.

Juan Rodriguez recruits the Duncans and their underworld table to help in his search for Consuela, but the response is not what he's expecting.