Guest Stars Greg Antonacci as Johnny Torrio Chris Caldovino as Tonino Sandrelli Julianne Nicholson as Esther Randolph Dominic Chianese as Leander Cephas Whitlock Patrick Kennedy as Dr. Douglas Mason Meg Steedle as Billie Kent Stephen Root as Gaston Means 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 Rony Clanton as Langston Christiane Seidel as Sigrid Rebecca Luker as Sister Agnes Joseph Caniano as Jake Guzik John Harrington Bland as Scotty Gulliver Mike Houston as Ralph Ryan Woodle as Phil Allen Lewis Rickman as George Baxter Ned Noyes as Hank Erin Fogel as Mary Clea Alsip as Viola Will Janowitz as Hymie Weiss Chris Cenatiempo as Scozione Timothy Sekk as Gilbert Longacre