"Project Blue Book’ Ending After Season 2 On History May 31, 2020 3:33:46 GMT Quote Select PostDeselect PostLink to PostMemberGive GiftBack to Top Post by Admin on May 31, 2020 3:33:46 GMT deadline.com/2020/05/project-blue-book-knightfall-cancelled-history-1202928179/Project Blue Book’ Ending After Season 2 On History