Zachary Quinto Dr. Oliver Thredson Actor Joseph Fiennes Monsignor Timothy Howard Actor Sarah Paulson Lana Winters Actor Evan Peters Kit Walker Actor Lily Rabe Sister Mary Eunice Actor Lizzie Brocheré Grace Actor James Cromwell Dr. Arthur Arden Actor Jessica Lange Sister Jude Actor Chloë Sevigny Shelley Guest Star Adam Levine Leo Morrison Guest Star Jenna Dewan Teresa Morrison Guest Star Clea Duvall Wendy Peyser Guest Star Mark Consuelos Spivey Guest Star Britne Oldford Alma Walker Guest Star Joe Egender Billy Guest Star Mark Engelhardt Carl Guest Star Marc Aden Gray Dad Guest Star Naomi Grossman Pepper Guest Star Gloria Laino The Mexican Guest Star Henry G. Sanders Willie Guest Star Ryan Murphy Executive Producer Brad Falchuk Executive Producer Dante Di Loreto Executive Producer Tim Minear Executive Producer