The Duncans are still dealing with the ramifications of the past. Vinnie Dash, the only remaining son of Sal, is still on the loose and dangerous. LC’s grandson, Nevada, is starting to ask questions that make his grandparents nervous.

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.