Lena Headey's 'Beacon 23' series will now air on MGM+ in November, previously slated for Spectrum and AMC. The eight-episode show, based on Hugh Howey's book, premieres on November 12 at 9 p.m. It's a science-fiction drama set in deep space, starring Lena Headey and Stephan James. The move follows the disbandment of Spectrum Originals, making MGM+ its new home.