Guest Stars Greg Antonacci as Johnny Torrio Eric LaRay Harvey as Dunn Purnsley Chris Caldovino as Tonino Sandrelli Domenick Lombardozzi as Ralph Capone Julianne Nicholson as Esther Randolph Ivo Nandi as Joe Masseria Ben Rosenfield as William H. "Willie" Thompson Glenn Fleshler as George Remus Stephen Root as Gaston Means Arron Shiver as Dean O'Banion Eric Ladin as J. Edgar Hoover James Cromwell as Andrew William Mellon Patch Darragh as Robert Bennett III Co Starring Nisi Sturgis as June Thompson Brandon Zumsteg as Brian Thompson Margot Bingham as Daughter Maitland Joseph Caniano as Jake Guzik Emma Holzer as Edith Thompson Joseph Riccobene as Frankie Yale Steve Beauchamp as Sid Franklin Ojeda Smith as Deacon Lemuel Cuffy Will Janowitz as Hymie Weiss Surya Botofasina as Mr. Coates Kayla Ferguson as Doris Dionne Audain as Mrs. Tremaine Bo Dietl as North Side Resident Jared Johnston as Federal Agent Sean Dugan as Jeffrey Romsey Richmond Hoxie as Harlan Stone Robert Verlaque as Professor Campbell Dunsmore as Miss Finch Renee Flemings as Mrs. Bridge
