The Ultimate Fighter - Season 21 (2015)

The pressure of the octagon bleeds into the house as tempers flare on both teams. Also, a medical emergency threatens the future of one of the fighters and his team.

One of the fighters struggles to cope with the devastation of his loss. Meanwhile, two fighters with a history in the octagon are ready for a rematch.

American Top Team rallies around their fighters, pushing themselves through the challenges ahead. Meanwhile, the Blackzilians must stay strong through the turbulence of the competition.

The coaches at American Top Team strive to reignite the passion and re-focus the energy in their fighters. Meanwhile, the Blackzilians must face the repercussions of a serious injury sustained by one of their teammates.

American Top Team must bring out one of their heaviest hitters in hopes of securing a win in the next fight. However, the quest for victory becomes more complicated when a Blackzilian rival rises to the challenge.

It's the first of the final four 100 point fights, and each team must give their all during the home stretch in this neck-and-neck match. The Blackzilians face more wounds when deciding who fights next. Meanwhile, American Top Team must choose a fighter with heart to rise to the occasion.

It's do or die for Dan and the American Top Team as they find themselves at a critical turning point in the competition. With the end in sight, Glenn and the Blackzilians make their plan to crush their competition, once and for all.

The Blackzilians assess their situation, regroup, and prepare for the next battle, while American Top Team choose a strong but unlikely fighter in hopes of bringing home the win.

It all comes down to the final fight of the season. The Blackzilians and American Top Team choose their best men to go head to head in the octagon in the hopes of winning bragging rights and the $200,000 prize.

With the show now over, the focus shifts to MGM Grand for The Ultimate Fighter Finale. The final fight of the season will be between Blackzilian's Kamaru Usman and ATT's Hayder Hassan for final bragging rights.