TLC will explore the conspiracy theories surrounding Diana, Princess of Wales’ untimely death in August 1997 in the new three-hour special, Princess Diana: Tragedy or Treason?

The program will also tell the story of her life via exclusive footage and interviews with Diana biographer Andrew Morton.

Produced by Jupiter Entertainment and American Media, Inc., Tragedy or Treason? will take a deeper look into her life, as well as the events leading up to the night of the Paris car accident that resulted in her death and look at several conspiracy theories surrounding the accident.

Viewers will hear from Morton, as well as her two personal friends, Mary Robertson and James Colthurst; Diana’s bodyguard Ken Wharfe, royal biographer Ingrid Seward; royal historian Kate Williams; and reporters Tamron Hall and Deborah Norville. Conspiracy theorist author and actor Richard Belzer gives insight to various notions of exactly what happened that tragic night.

Princess Diana: Tragedy or Treason? airs July 31 at 8 p.m. ET/PT. Viewers can catch an early premiere of the first full hour on TLC GO starting July 24.