Plot Synopsis

Directed and executive produced by Alexa Danner, THE HILLSIDE STRANGLER: MIND OF A MONSTER is a three-episode documentary series that focuses on the relationship between Ken Biachi and Los Angeles' notorious Hillside Strangler. A serial killer stalks Los Angeles in the 1970s, leaving bodies on display throughout the Hollywood Hillside. After a man named Kenneth Bianchi is arrested in 1979 on the suspicion of a double homicide in Bellingham, Washington, it doesn't take long for Los Angeles investigators to connect the dots back to the serial killer they dubbed "The Hillside Strangler." But there's a catch -- through a series of explosive recorded interviews with various psychologists and psychiatrists, Bianchi claims that the perpetrator is NOT him; it's actually his multiple personality, 'Steve' -- and that's not all he has to say on the matter. All three episodes of THE HILLSIDE STRANGLER: MIND OF A MONSTER dropped on Tuesday, December 28, 2021 on discovery+.

THE HILLSIDE STRANGLER: MIND OF A MONSTER made its linear television debut on Monday, May 30, 2022 from 9pm-Midnight ET/PT, as Investigation Discovery aired all three episodes back to back.