Mark Frost revealed that the murder mystery at the heart of Twin Peaks was shaped by two real cases from his past. One involved the killing of his friend's older sister, and the other was the 1908 death of Hazel Drew.
Series co-creator Mark Frost shared details of the inspirations behind Twin Peaks in recent interviews. He described how the brutal murder of his close friend's older sister at a boarding school in Vancouver affected him deeply as a teenager. Frost was about 14 at the time and recalled having a crush on the victim, who was a year older than him. The event devastated both the family and Frost himself, he said in an interview with The Guardian.
