| Robert Stack | Actor,Whitey Steele |
| Bruce Gordon | Actor,Frank Nitti |
| Charles Bronson | Janos Kolescu. |
| Charles McGraw | Mayberry (Pete Kalik) |
| Herschel Bernardi | Julie Vernon |
| Jack Klugman | Morton Halas |
| James Gregory | Walter Traeger |
| John Larch | Bull Hanlon |
| Marc Lawrence | Mike Genna |
| Martin Balsam | Arnold Justin |
| Paul Richards | Sebastian |
| Peter Falk | Nate Selko |
| Ruth Roman | Georgie Drake |
| Telly Savalas | Matt Bass |
| Wendell Corey | Willard Thornton |
| Albert Salmi | Steve "Country Boy" Parrish |
| Allyn Joslyn | Wallace Lawton |
| Anthony Carbone | Angelo Genna |
| Arthur Hill | Father Francis Gregory |
| Barbara Luna | Magda Bartok |
| Cloris Leachman | Billie Traeger Mailer |
| Harold J. Stone | Adam Stone |
| Jay C. Flippen | Big Joe Hovack |
| Martin Landau | Larry Coombs |
| Mike Kellin | Lou Mungo |
| Murray Hamilton | Harry Danigan,Michael Barrigan |
| Victor Buono | Parnise Surigao |
| Walter Winchell | Actor |
| Anne Helm | Marian Keyes |
| Don Gordon | Frankie Gruder,Johnny Selkirk |
| Dyan Cannon | Mavis Carroll |
| Frank Puglia | Carlo Giovanni |
| George Tobias | Big Mike Probich |
| Henry Silva | Joker |
| John Kellogg | Lucky |
| Mary Fickett | Emmy Sarver |
| Milton Selzer | Jason Fiddler |
| Ned Glass | Regal |
| Nicholas Georgiade | Actor |
| Simon Oakland | Mr. Pal (Joe Palakopolous) |
| Theo Marcuse | Alex,Oscar Symes |
| Will Kuluva | Turkin |
| Abel Fernandez | Actor |
| Alan Baxter | Harry Mailer |
| Arline Sax | Stella Giovanni |
| Bert Convy | Eddie Paris |
| Carroll O'Connor | Barney Lubin |
| Ed Asner | Fedor Bartok |
| Ed Nelson | Johnny Preble |
| Eduardo Ciannelli | Greogry Pindar |
| Gavin MacLeod | Whitey Metz |
| Harvey Stephens | F. Scott Bodeen |
| Joan Staley | Marcia |
| John Alderson | Grote |
| Joseph Ruskin | Alexander Raeder |
| Mario Alcalde | Marty Gladwin |
| Michael Constantine | Seth Otis |
| Robert Emhardt | Janos "Willie" Willinski |
| Vincent Gardenia | Jake Petrie |
| Anne Whitfield | Sue |
| Dabbs Greer | Agent Ned Ferber |
| Grant Richards | Nick Dolov |
| Herbie Faye | Lefty |
| Joseph Bernard | Solly Wilks |
| Michael Dana | Al Deemers |
| Oscar Beregi | Joe Kulak |
| Phillip Pine | Griff "Ace" Darden |
| Richard Bakalyan | Benno |
| Robert Bice | Capt. Jim Johnson,Capt. Johnson |
| Steve Gravers | Tony Genna |
| Stewart Bradley | Nails Hanson |
| Vaughn Taylor | Harker Wade |
| Vladimir Sokoloff | Sam |
Technical Credits
| Abner Biberman | Director |
| Bernard Kowalski | Director |
| Bernard McEveety | Director |
| Paul Wendkos | Director |
| Stuart Rosenberg | Director |
| Vincent McEveety | Director |