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.

LC visits Randy in the hospital. Orlando Duncan's body is returned. Sasha travels to New York to confront LC Duncan.

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

The Duncans deal with a shocking revelation about their enemy and LC sits down with the underworld leaders to discuss the future of HEAT while new threats appear.

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.

Things spin out of control for the family as London teams up with Sasha in an attempt to hunt down Brother X and Elijah. Meanwhile, Paris is in Europe.

The Duncans all turn up the heat in their search for Brother X, while Harris takes one for the team to get the job done. Bernie finally shows his true colors.

As the war intensifies, Orlando sits down with Elijah just as one of the Duncan faithful goes down in a blaze of bullets and a family member is taken prisoner.

By day, the Duncan's are an upstanding family who run a thriving exotic car dealership in New York; by night, they live a dangerous secret life; when they come under siege the Duncan's will have to stick

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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 dissatisfaction with Sebastian has dire consequences.