In this episode, the band come to terms with the reality of being in the toughest boyband bootcamp in the world. After a poor assessment by head of training and casting, Hee Jun Yoon, the boys discuss the fallout and what they need to do to improve.

But band member James is besieged by medical issues, first a bad knee and then a bout of tonsilitis.

In between intense vocal training and choreography, the band meet up with K-Pop legend Shindong from Super Junior, who sets them a dance challenge at the top of the fifth tallest building in the world – the Lotte Tower. Will the band make it onto the infamous Sky Walk Bridge?

The K-Pop Cowboy returns, this time to give the boys a day off at Seoul's largest theme park.

This week's song, Solar, is to be performed at the School of Performing Arts, Seoul, in front of 500 students. It's the first time the boys have performed in front of a live audience, but one of them is absent – will they pull together and make it as a four-piece?

Twenty-four hours later, the boys come face to face with Hee Jun Yoon, SM Entertainment's director of training and casting, who evaluates their school performance. Have they managed to up their game and earn her seal of approval?

Dexter, James, Olly and Reese try to build bridges with band member Blaise, who's feeling increasingly isolated from the rest of the band. In the training room, they try choreography wearing a blindfold in an attempt to master their moves, but will the band turn the corner and get approval from K-pop creator Heejun Yoon? 

They also immerse themselves in Korean culture as they visit a traditional folk village with K-pop legend Shindong, and they are taken to a Korean food market by the K-Pop Cowboy, who encourages them to sample some local delicacies, including pig's trotters, chicken feet and octopus. Have they got the nerve to try everything?