"American Horror Story," according to FX, "revolves around the Harmons, a family of three who moved from Boston to Los Angeles as a means to reconcile past anguish." Murphy, Falchuk and Dante Di Loreto are executive producers of the series.

In the show's second season, returning cast members will play new characters in a new setting at an East Coast institution.

"We don't want to talk about it too much, we're still writing, anybody could pop up at any time," said Murphy at the PaleyFest in Beverly Hills. "The only real rule on this show is no werewolves and no vampires."