'Atypical' Season 4 coming to Netflix in July UPI News Service, 06/01/2021 Atypical will return to Netflix in July. ADVERTISEMENT The streaming service said Tuesday that the show's fourth and final season will premiere July 9. Netflix also shared first-look photos for Season 4 featuring Keir Gilchrist as Sam Gardner, a teenager on the autism spectrum. Brigette Lundy-Paine plays Sam's sister, Casey. Atypical is created, written and executive produced by Robia Rashid. The series co-stars Jennifer Jason Leigh, Michael Rapaport, Graham Rogers, Nik Dodani and Jenna Boyd. Season 3 centered on Sam (Gilchrist) navigating his first year of college. The season also followed Casey (Lundy-Paine) as she started a relationship with Izzie (Fivel Stewart), a student at her new school.