Guest Stars Daniel Henshall as Leonard Patz Ben Taylor as Derek Yoo J.K. Simmons as Billy Barber Poorna Jagannathan as Dr. Elizabeth Vogel Hale Lytle as Matt McGrath Therese Plaehn as Lita McGrath Co Starring William Xifaras as Father O'Leary Mariko Kanto as Waitress Cheryl McMahon as Mrs. Mandel