Krzysztof Soszynski as Ken 'The Executioner' Dietrich.In the closing scene, the music program is saved, the school is operating on a normal budget thanks to Scott's donation and Niko and all of the students in Scott's citizenship class attend their American citizenship ceremony.

Scott and Bella kiss through the chain link fence of the ring. Scott struggles to survive the first two rounds, but after finding inspiration from the students, he manages to win in the third and final round of the fight, earning $50,000 and Dietrich's respect. Scott has no answer to his dangerous opponent Ken Dietrich, who is angered that his original opponent cancelled and that he is stuck with a man that 'does not deserve' to be fighting at the UFC. During the fight, Marty reminds the losing Scott that even if he does not win, he has inspired the students, which is their real purpose as teachers. The publicity of Scott's slow rise to fame has grown, and the school's band appears in the stands to play his theme song, ' Holly Holy' by Neil Diamond, thanks to Bella contacting Rogan. All Scott's efforts have been in vain, and he decides he must win the fight and the $50,000. The night he arrives, Bella calls Scott to tell him that the school's vice principal Robert Elkins has been arrested for embezzling from the school, including Scott's winnings. Scott and Niko accept the offer, and they travel to the MGM Grand Las Vegas for the fight. Scott confronts Niko, who apologizes and admits he turned it down because he was jealous – Niko was once asked to fight at the UFC but suffered a neck injury while training for it, ending his career. Scott is within $6,000 of his goal when Mark tells him that Niko turned down a sanctioned UFC fight offered by Joe Rogan, with the certainty of earning $10,000 for a loss. He begins to engage the class and earns the respect of his students. Scott has been pursuing the school nurse, Bella Flores, and they share moments flirting with each other, while also rekindling Scott's passion for teaching. Scott then begins fighting in small MMA fights and gradually gaining greater amounts of money for the school.

While Marty trains with Scott, Malia De La Cruz, one of Scott's students and a band member, helps Niko study for his citizenship test by putting the information into songs. Niko begins training him in defense, later adding trainer Mark to teach offense, after Scott knocks out opponent 'Lucky' Patrick Murray and realizes that wins give larger payouts, needing fewer fights to achieve his goal. Scott, helped by Niko and Marty, begins with small unsanctioned bouts paying only $750 to the loser. While watching the UFC at Niko's apartment, Scott learns that the loser of a fight receives $10,000, which gives him the idea of raising the money by fighting and losing in MMA. When Scott arrives at Niko's apartment, he learns that Niko is a former MMA fighter. He moonlights as a night instructor for an adult citizenship class, where student Niko requests outside tutoring. Concerned for both his colleague and his students, Scott attempts to raise the $48,000 necessary to keep the music program running. Budget cutbacks at the school jeopardize the continuation of its music program, which would result in its teacher, Marty Streb, being laid off. Former Division I collegiate wrestler Scott Voss is a 42-year-old bored and disillusioned biology teacher at the failing Wilkinson High School.

Boom fighters