Netflix gives eight-episode order for Unbelievable from Erin Brockovich writer Susannah Grant Netflix has given an eight episode limited series order to Unbelievable, which comes to us from Erin Brockovich writer Susannah Grant, according to Deadline. Unbelievable will be produced by CBS TV Studios, producers Sarah Timberman and Carl Beverly (Masters of Sex) and news anchor Katie Couric. Unbelievable will be co-written by Grant who will also serve as showrunner, with Michael Chabon (John Carter) and Ayelet Waldman (Applebaum) The show is based on an article from December 2015 called “An Unbelievable Story of Rape” by T.