Princess Dianas Wicked Stepmother is a 2018 English-language Documentary series. A brief look at what role Raine Spencer, Princess Diana's stepmother, had in Diana's turbulent upbringing and how the two became friends in later life. Princess dianas wicked stepmother features Prince Charles, Princess Diana and Raine Spencer. It was released on 31st August 2018. A brief look at what role Raine Spencer, Princess Diana's stepmother, had in Diana's turbulent upbringing and how the two became friends in later life.