Ever since her death in 1997, conspiracy theorists have sought to prove that the crash that killed both Princess Diana and Dodi Al Fayad was no accident. Now, while a year-long investigation that will lead up to a U.K. inquest takes place, The Diana Conspiracy examines the various theories. The documentary poses questions about the origin of these theories and wonders why people cling to them.

The program includes the first British TV interview with the head of the French police inquiry and an exclusive interview with Diana's close friend Rosa Monckton. Other interviews with investigative journalists, crash investigators, a Paris hospital spokesman and a Royal historian are also included.

Sunday, 8/27 from 2-3 p.m. ET

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