Guest Stars Kevin O'Rourke as Mayor Edward Bader Eric LaRay Harvey as Dunn Purnsley Domenick Lombardozzi as Ralph Capone Peter McRobbie as Supervisor Frederick Elliot Stephen Root as Gaston Means Brian Geraghty as Agent Warren Knox / Jim Tolliver Arron Shiver as Dean O'Banion Ty Michael Robinson as Samuel Crawford Eric Ladin as J. Edgar Hoover Morgan Spector as Frank Capone Sean Cullen as Carl Billings Co Starring Christiane Seidel as Sigrid Mueller Christina Jackson as Maybelle White Natalie Wachen as Lenore White Thomas Endres as Philadelphia Enquirer Reporter Katherine Waterston as Emma Harrow Will Janowitz as Hymie Weiss Allen Lewis Rickman as George Baxter Jennifer Bowles as Babette's Dancer Jonathan Brody as Reporter Noel Wilson as Ward Boss Jo Armeniox as Alma Pastor DeWitt Fleming Jr. as Tap Dancer 1 G. Michelle Robinson as Mrs. Crawford Jared Grimes as Tap Dancer 2 Peter Francis James as Oliver Crawford Rick Kain as Ira Carroll Ed Moran as Agent Pearl Stephen Paul Johnson as Dolph Liebling
