Neal McDonough William Parker Actor Edward Burns Ben "Bugsy" Siegel Actor Jeremy Luke Mickey Cohen Actor Jon Bernthal Joe Teague Actor Jeffrey DeMunn Hal Morrison Actor Milo Ventimiglia Ned Stax Actor Alexa Davalos Jasmine Fontaine Actor Robert Knepper Sid Rothman Actor Gregory Itzin Mayor Fletcher Bowron Actor Ernie Hudson Guest Star John Pollono Guest Star Andrew Rothenberg Guest Star Richard Brake Guest Star Dana Gould Guest Star Mike Hagerty Guest Star Frank Darabont Executive Producer Michael De Luca Executive Producer Elliot Webb Executive Producer David J. Schow Writer Guy Ferland Director