Diana Scarwid plays the role of Mother Superior in the episodes "Bzzzzzzzz!", "Circus, Circus" and "Bad Habits". As with Lily before her, she does her very best to lead Olive to the light, though she does likewise for all her other charges also.
Bryan Fuller fans may recognize Scarwid from Fuller's previous show, Wonderfalls, where she portrayed Karen Tyler, the mother of the main character and Lee Pace's character. Her other high profile projects include the 1983 film Rumble Fish, directed by Francis Ford Coppola.