Guest Stars Greg Antonacci as Johnny Torrio Dominic Chianese as Leander Cephas Whitlock Julianne Nicholson as Esther Randolph Stephen Root as Gaston Means Meg Steedle as Billie Kent Patrick Kennedy as Dr. Douglas Mason Arron Shiver as Dean O'Banion Kerry O'Malley as Edwina Shearer James Cromwell as Andrew William Mellon Clarke Thorell as Clifton King Co Starring Chris Caldovino as Tonino Sandrelli Christiane Seidel as Sigrid Mueller Joseph Caniano as Jake Guzik Rony Clanton as Langston Will Janowitz as Hymie Weiss John Harrington Bland as Scotty Gulliver Mike Houston as Ralph Rebecca Luker as Sister Agnes Allen Lewis Rickman as George Baxter Ryan Woodle as Phil Ned Noyes as Hank Erin Fogel as Mary Clea Alsip as Viola Chris Cenatiempo as Scozione Timothy Sekk as Gilbert Longacre
