The Ultimate Fighter: Team McGregor vs. Team Chandler Season 9

Michael Bisping drops by the house for a meal with his fighters, after which some UK teammates get out of control. Then in the final semifinal fight, Frank Lester and James Wilks face off in a rematch to see who will fill the last spot in the finale.

One Team UK member is exposed for his embarrassing habit, while another suffers an injury in training. And in two action-packed semifinal match-ups, four lightweight fighters slug it out to earn their spot in the live finale.

Dana adds a wrinkle to the semifinal matchups that infuriates the coaches. Team USA wonders if there's a traitor in their midst. And a bruising three round battle kicks off the semifinal fights.

Dana decides which Team USA fighter will replace Jason Pierce and take on David Faulkner in the final preliminary fight. And both teams collide in a heated argument over changing training times.

A Team USA injury becomes a nasty infection, while one of the Brits struggles with a career-threatening mental problem. Then, after the next preliminary fight, Dana is forced to make a controversial decision that could blow the competition wide open.

Sudden injuries and infections leave everyone wondering who will be chosen to fight. Pierce becomes an outcast among his team. Bisping and Henderson go head-to-head in the Coaches Challenge.

One fighter’s nerves nearly incapacitate him. Another makes a pre-fight bet that ends in a bizarre payoff. Two fights in one episode continue the battle between nations.

Team USA’s infighting drives one American to form a bond with the Brits. Four fighters enter the Octagon for lightweight and welterweight bouts, and a coach fails to support his team member.

Team USA grows tired of Bisping's cockiness and retaliate against the British team. After a clever strategy session and intense training it's finally time for the first US vs UK preliminary fight.

The Americans and Brits move into the house as a fighter loses control and is ostracized. The last two Team USA members are decided when Kiel Reid and Jason Dent take on Frank Lester and Rob Browning.

With Team United Kingdom set, the US elimination fights get underway in Las Vegas. But the Americans stumble badly out of the gate, and Dana questions Team United States commitment.

For the first time ever, The Ultimate Fighter will be country vs. country as the United States takes on the United Kingdom. Dana White travels to England to watch 16 of Great Britain's toughest welterweights and lightweights fight their way onto coach Michael Bisping's UK Team.