 | George C. Scott als Walter Upjohn Ballentine |
 | Joanna Cassidy als Eleonora |
 | Sorrell Booke als Al G. Karp |
 | Clifton James als Bulldog Streiger |
 | Bob Balaban als Victor Karp |
 | Bibi Osterwald als Mums Gornik |
 | G. Wood als Andrew Constable |
 | Frank McRae als Herman Lincoln (aka Herman X) |
 | Don Calfa als Stosh Gornik |
 | Liam Dunn als House Painter |
 | Jack Riley als Agent Jackson |
 | Hank Stohl als Johnson |
| Gower Champion | Director |
| Donald E. Westlake | Novel |
| Wendell Mayes | Writer |
| Harry Stradling Jr. | Director of Photography |
| Hal Landers | Producer |
| Bobby Roberts | Producer |
| John Morris | Music |
| David Bretherton | Editor |
| Albert Brenner | Art Direction |
| Tom Shaw | Assistant Director |
| Richard Tim Vanik | Camera Operator |
| Barry Thomas | Sound Mixer |
| Robert Knudson | Sound Re-Recording Mixer |
| Charles Bonniwell | Second Assistant Director |
| Tom D. May | Key Grip |
| Clifford Hutchison | Gaffer |
| Betty A. Griffin | Script Supervisor |
| David Ramirez | Assistant Editor |
| George Gaines | Set Decoration |
| Ray Mercer Jr. | Property Master |
| G. Tony Scarano | Wardrobe Supervisor |
| Patricia Norris | Wardrobe Supervisor |
| Del Acevedo | Makeup Artist |
| Joan Phillips | Hairstylist |
| Burke Mattsson | Title Designer |
