The cable network has cancelled Project Blue Book and Knightfall after two seasons a piece, Deadline reports.
Project Blue Book, which hailed from executive producer Robert Zemeckis, was based on the true investigations into UFOs and related phenomena conducted by the United States Air Force in the 1950s and ’60s.
TVLine’s Cable Scorecard has been updated to reflect Project Blue Book and Knightfall‘s cancellations.
With the fates of Project Blue Book and Knightfall decided, that leaves History with only the last 10 episodes of Vikings’ sixth and final season, which do not yet have a premiere date.