Episode 10

The girls prepare for the final showcase, where the Major and Minor teams will perform "Do It Again" back to back. The teams spend one last night together reminiscing on their journey throughout the show, laughing at each other's silly moments, and sharing their heartaches and hopes. After the final performances, the girls receive praises from JYP. Chae Yeon, Eun Suh, Momo, and Ji Won join the final contestants on stage for a farewell performance before the results are announced. The finalists are gathered on stage where the Major team turns in their necklaces. Na Yeon, Jeong Yeon, and Da Hyun take the place of Natty, So Mi, and Min Young in Major lineup, respectively, thus eliminating them alongside Tzu Yu and Chae Ryeong. JYP then throws in a twist, announcing that Twice will be a nine-member group. Along with the current Major line up (Na Yeon, Ji Hyo, Mina, Da Hyun, Jeong Yeon, Chae Young, and Sana), he chooses Tzu Yu to join. JYP then surprises the contestants and the audience by announcing that Momo, who was eliminated in the fourth mission, will be the final member of Twice. Tzu Yu is added from audience's opinion through online voting and Momo from the A&R Team and the Trainers' decision. The group's final line up is: Na Yeon, Jeong Yeon, Momo, Sana, Ji Hyo, Mina, Da Hyun, Chae Young, and Tzu Yu.