First Look: 'Insidious: Chapter 3' Which Predates the First Two Films Focus Features just recently pushed back the release of Insidious: Chapter 3 to the summer of 2015, but we only knew one cast member and didn't have any story details. That changes with the beginning of production and a first look photo announcement revealing that Dermot Mulroney will also be joined by Stefanie Scott (of Blumhouse Productions' Jem and the Holograms) and returning cast members Lin Shaye, Angus Sampson and Leigh Wannell (who is also directing in place of James Wan).

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