Trailer
Images
 | Ben Gazzara as Al Capone |
 | Harry Guardino as Johnny Torrio |
 | Sylvester Stallone as Frank Nitti |
 | Susan Blakely as Iris Crawford |
 | John Cassavetes as Frankie Yale |
 | Frank Campanella as Big Jim Colosimo |
 | John Orchard as Dion O'Banion |
 | Carmen Argenziano as Jack McGurn |
 | George Chandler as Robert E. Crowe |
 | John Davis Chandler as Hymie Weiss |
 | Royal Dano as Anton J. Cermak |
 | Joe De Nicola as Charles Fischetti |
 | Angelo Grisanti as Angelo Genna |
 | Peter Maloney as Jake Guzik |
 | Dick Miller as Joe Pryor |
 | Robert Phillips as Bugs Moran |
 | Martin Kove as Pete Gusenberg |
 | Mario Gallo as Giuseppe Aiello |
| George Milan as William H. Thompson |
 | Russ Marin as Joseph Stenson |
 | Tony Giorgio as Antonio Lombardo |
 | John Martino as Tony Amatto |
| Bert Conway as Frank Loesch |
| Don Pulford as William Cooper |
| Pamela Toll as Mrs. Atkins |
| Eugenia Stewart as Miss Detwiller |
 | Don McGovern as N.Y. Cop #1 |
 | Redmond Gleeson as N.Y. Cop #2 |
 | John Finnegan as N.Y. Police Lt. |
| Laurence Hagen as Samuel Ettelson |
| Tom Cook as Sam Volenta |
 | Vincent Barbi as Solly |
| Tina Scala as Mrs. Torrio |
 | James V. Christy as Thomas Bronk |
| Jack Ackerman as Adam Heyer |
| Ralph James as Judge J.H. Wilkerson |
 | Carmen Filpi as Waiter |
| Jim Galante as John May |
 | John Howard as Warden J. Johnston |
 | Beach Dickerson as Joe Kepka |
| John C. Broderick as Maitre d' |
| Chuck Traynor as Senator |
| James R. Sweeney as Prison Doctor |
| George Engelson as Torrio's Doctor |
| Deborah Klose as Female Reporter |
| John Favorite as First Reporter |
| John Armond as Second Reporter |
| Jack O'Leary as Pool Hall Owner |
| Ben Marino as Frank Gusenberg |
 | Vincent Di Paolo as Mob Soldier (uncredited) |
| Directing | |
| Steve Carver | Director |
Writing | |
| Howard Browne | Writer |
Production | |
| Roger Corman | Producer |
Editing | |
| Richard C. Meyer | Editor |
Art | |
| Ward Preston | Art Direction |
| Ned Parsons | Set Decoration |
Costume & Make-Up | |
| Maurice Stein | Makeup Artist |
Crew | |
| Steve Ferry | Property Master |
| V.R. Bud Shelton | Property Master |
| Roger George | Special Effects |
Costume & Make-Up | |
| Patricia Miller | Hairstylist |
Production | |
| Peter Cornberg | Production Supervisor |
Crew | |
| Charlie Picerni | Stunt Coordinator |
Camera | |
| Héctor R. Figueroa | Camera Operator |
Directing | |
| Jann Carver | Script Supervisor |
Camera | |
| Vilis Lapenieks | Director of Photography |
Art | |
| Stephen R. Ferry | Property Master |
Production | |
| John C. Broderick | Associate Producer |
Directing | |
| Eugene Mazzola | Assistant Director |
| Teri Schwartz | Assistant Director |
Editing | |
| Barbara Meyer | Assistant Editor |
Production | |
| Jerome L. Posner | Location Coordinator |
Sound | |
| Robert Gravenor | Sound Mixer |
| Gene Corso | Sound Effects Designer |
| Lowell Brown | Boom Operator |
| Samuel C. Crutcher | Assistant Sound Editor |
Lighting | |
| Lee Heckler | Lighting Director |
Camera | |
| Robert Edesa | First Assistant Camera |
Sound | |
| David Grisman | Original Music Composer |
