Four young women auditioned for The X Factor as soloists and all failed, pasted together by producers as temporary television fodder expected to vanish within weeks. This episode charts how Little Mix instead outlasted their peers, shattered records, and became one of the best-selling girl groups of all time.

We follow their chaotic origins, their four-part harmonies as a survival tactic, and their breakthrough into the notoriously hostile US market. Then comes their fight for creative control: the split from Syco, becoming vocal advocates for feminism and LGBTQ+ rights, surviving Jesy Nelson's departure, and their historic BRIT Award.

• How they were first placed in two separate failed groups before being merged
• Rebranding from Rhythmix to avoid harming a children's music charity
• Beating the Spice Girls' record for ...