Rabe, 33, who has appeared in all of the past four seasons, will appear in "American Horror Story: Hotel" as a serial killer and former guest of the hotel, reported E! Online.
The "All Good Things" actress played three different characters in the first three seasons of the show. Nora Montgomery in first season, Sister Mary Eunice in season two, Misty Day in season three and changed things up a bit by playing Sister Mary Eunice again in season four.
Creator Ryan Murphy had earlier said things would start to connect more than ever this season, with "more and more" former 'Horror Story' characters checking into the hotel.