Season 1 of Kingdom premiered on October 8, 2014.

Alvey Kulina and his girlfriend Lisa Prince struggle with keeping their gym, Navy St., financially stable. Their best hopes are Alvey's younger son, Nate, an up an coming fighter, and Lisa's ex-fiance and former MMA champ, Ryan Wheeler, just released on parole from prison.

Season 2 of Kingdom premiered on October 14, 2015.

Season two begins with Ryan “The Destroyer” Wheeler defending his title and Jay finding a new obsession. Alvey’s improved fortune has led to a bigger gym, but also a bigger appetite for risk. Lisa, the beautiful and fierce second in command at Navy St. MMA, focuses on managing Alicia, an impulsive but skilled female fighter. Nate's determination to get back in the cage causes rifts with his family and complicates his self-identity. Christina gets a taste of sober life while continuing to carry the burden of her sons’ struggles towards victory—with victory comes agony and a price.

Season 3 of Kingdom premiered on May 31, 2017.

Season three is filled with relatable incidences - the battle for recognition, the exhilaration of victory, the humiliation of defeat and the memories of dreams shattered until a single moment introduces the possibility of a better or, at least different, future. Despite the hard punches inside the cage, the Navy St. MMA family never lose sight of their humanity, the strength of family bonds and battling demons in and out of the cage.