The Ultimate Fighter - 27 ª Season

For the first time ever sixteen undefeated fighters from around the world, eight lightweights and eight featherweights, come to Las Vegas to compete on The Ultimate Fighter. The competition begins with coaches Daniel Cormier, the current UFC light heavyweight champion, and Stipe Miocic, the current UFC heavyweight champion, putting the fighters through drills to evaluate their skills. Then after UFC President Dana White arrives and greets the fighters, the coaches pick their teams and choose the first preliminary matchup. After the fighters move into The Ultimate Fighter house, training begins with both teams holding their first practices. The tension continues to build as the teams prep their fighters for the first preliminary matchup of the season.

With the tournament now officially underway, Stipe Miocic and his coaching staff decide it's time to get the pranks started. Before practice, they redecorate Team Cormier's locker room by adding some questionable pictures to the walls. Stipe then turns his attention to his first featherweight fighter, who is extremely confident that his well-rounded game will be too much for his opponent to handle. As the blue team arrives for their practice session, they are surprised to find their defaced locker room. Cormier is amused and immediately retaliates in shocking fashion. During practice, a fighter loses his calm and proceeds to question Cormier's instructions. The two hash things out in front of their team. Back at the house, the fighters get to know each other and one of the featherweights opens up about his life. Through his home video footage, we find out about his recent move to a big gym and his life with his girlfriend. Nearby, his opponent shares his passion for fighting with one of his teammates. In his home video, we learn more about his day to day at the gym and get to meet his significant other. Back at practice, Team Cormier's upcoming featherweight reveals his analytical approach to the sport as he prepares for the bout. On fight day, the two fighters give it their all and the winner becomes the first featherweight semifinalist in the competition.

During a tense van ride back to the house after practice, two teammates get into a heated exchange. After the words get personal, a teammate steps in and attempts to resolve the conflict. As two lightweights prep for their upcoming fight, one of them gets into a argument at the house during his weight cut, calling out a fellow fighter. Then, in the third preliminary fight, two lightweights face off with a spot in the semifinals on the line.

After the fight announcement, coach Cormier reveals to his team that he must leave for a few days, leaving Cain Velasquez in charge of training for the next bout. The fighters return home and one of them reveals that he is struggling with an injury. The next day, Team Miocic is back in the gym to prep a strong stand up specialist who is looking to finish his opponent with his striking. Back the house, Team Cormier's next competitor finds an interesting way to combat boredom, crafting a bow and arrow from scratch. Through his home video, he shares his passion for hunting and introduces us to his girlfriend and mother. Meanwhile, Team Miocic's fighter shares powerful war stories with his teammates. In his home video, we learn about the many tragedies that he lived through, how he found MMA and landed on his feet after leaving the army. As the fight approaches, Cain Velasquez and Cormier's assistant coaches work hard to prepare their fighter. Meanwhile, the injured fighter continues to worry about his situation and decides to visit the doctor for a diagnosis. The day of the fight both fighters give it all they have and the winner advances to the semifinals.

At the house, the rivalry between Tyler of Team Cormier and Suman of Team Miocic continues to heat up after Tyler tells Suman to pick him next in the upcoming fight selection. Later that day at the gym, Team Miocic assistant coach Marc Montoya discovers a prank pulled by the fighters from Team Cormier. After one of the fighters injures his knee during team training, he heads to the UFC's Performance Institute for treatment. While being examined by a physical therapist, an assistant coach from the opposing team walks in on him and discovers his injury. Before the next training session, the coach teases him by letting his entire team know about his secret injury, setting off heated argument. Then, in the fifth preliminary fight, two lightweights face off in the Octagon with a spot in the semifinals on the line.