Secrets & Scandals

As the BBC series celebrates its 20th year on air, this documentary recognises its many highs, its occasional lows, the costumes, the competition - and the controversies. The history of Strictly is charted amid insider secrets from the judges, professional dancers and celebrity contestant. Plus, the best and worst competitors are remembered and the pioneering ground the show has broken by championing those with disabilities and leading the way on same-sex dancing pairings recognised.

For decades, Top of the Pops was the most popular music show in the UK, but behind the image, there was often a backstage reality of drink, drugs and rock 'n' roll behaviour.