SERIES PREMIERE: Emma Roberts, who’s stood out in the most recent American Horror Story reboot, stars in this new series, also from Ryan Murphy. It’s also envisioned as an anthology series, reimagining itself after each season, which in this case is planned at 13 episodes. It’s set at a college sorority, where a bloody and long-buried tragedy from 20 years before returns to haunt Roberts’ Chanel Oberlin and the rest of her snooty sorority sisters, as well as the geeky new