INSIDIOUS: CHAPTER 3 New TV Spots Experience the new INSIDIOUS: CHAPTER 3 TV spots! The prequel, directed by Leigh Whannell, stars Dermot Mulroney, Stefanie Scott, Lin Shaye, Angus Sampson, and Whannell himself. INSIDIOUS: CHAPTER 3 will be released in theaters on June 5. A prequel set before the haunting of the Lambert family that reveals how gifted psychic Elise Rainier reluctantly agrees to use her ability to contact the dead in order to help a teenage girl who has been targeted by a dangerous supernatural entity.