Looking at how Amelia Earhart's legacy has lived on thanks to her beloved sister, `Pidge', 80 years since her plane disappeared on her historic round-the-world flight.

The Mitford sisters were once close, but political ideologies and their love for different men led to estrangement.

Explores the complicated relationship between Jacqueline Kennedy Onassis and her sister, Lee Radziwill. Their life of high fashion and parties masking sibling rivalry and tragedy.

Anne Frank and her family moved to Amsterdam following the uprising of the Nazi Party in 1933; Eva Schloss remembers the Nazis marching on Austria and her family settling in Amsterdam the same year where she met and formed a bond with Anne Frank.

How the relationship between Elizabeth, a mature child with a love of animals, and her sister, Margaret, a mischievous extrovert, shaped the monarchy.

Explores the truth behind the stories of Anne Boleyn, the eventual wife of Henry VIII, who is seen as either schemer or victim, and her sister Mary, who is less remembered and often dismissed as a fool.