Peter White Television EditorEXCLUSIVE: Alexa Mansour, one of the stars of the upcoming zombie spinoff The Walking Dead: World Beyond, has signed with UTA. The agency will represent the newcomer in all areas.This comes as it emerged that The Walking Dead: World Beyond will premiere on AMC on October 4.The Walking Dead: World Beyond delves into new TWD mythology to follow the first generation raised in a surviving civilization of the post-apocalyptic world.