Mike Flanagan Creator, Executive Producer Zach Gilford Riley Flynn Actor Kate Siegel Erin Greene Actor Hamish Linklater Father Paul Actor Annabeth Gish Dr, Sarah Gunning Actor Michael Trucco Wade Scarborough Actor Samantha Sloyan Beverly Keane Actor Henry Thomas Ed Flynn Actor Crystal Balint Dolly Scarborough Actor Matt Biedel Sturge Actor Alex Essoe Mildred Gunning Actor Rahul Kohli Sheriff Hassan Actor Kristin Lehman Annie Flynn Actor Robert Longstreet Joe Collie Actor Igby Rigney Warren Flynn Actor Rahul Abburi Ali Hassan Actor Annarah Shephard Leeza Actor