The rhythmic team has a fight on their hands when a long-term member quits, and so the team's reserve steps in to try and save the day. For the first time ever, the Acrobatic Men's Four are invited to trials for the World Championships - but when it comes to costumes for the day, they realise their performance on the floor is not their only concern! And Olympic and Commonwealth champion Nile Wilson sets what for most is an impossible challenge.