Characters played by Sean Faris
Jack McGurn
Characters played by Milo Gibson
Al Capone
Characters played by Jason Patric
Detective Reed
Characters played by Jamie-Lynn Sigler
Lulu Rolfe
Characters played by Peter Facinelli
George 'Bugs' Moran
Characters played by Mark Rolston
Dion O'Banion
Characters played by Michael Paré
O'Connor
Characters played by Sean Kanan
Detective Boyle
Characters played by Al Sapienza
Johnny Torrio
Characters played by Shane P. Allen
Anthony Bascone
Characters played by Shane Almagor
Paperboy
Characters played by Drake Andrew
Giovanni Scalise
Characters played by Thaddeus Armstrong
North Side Mobster
Characters played by Jody Barton
Detective Randall
Characters played by James Bartz
Agent McConnell