Nicolai Dalchimski, a mad KGB agent steals a notebook full of names of "sleeping" undercover KGB agents sent to the U.S. in the 1950's. These agents got their assignments under hypnosis, so they can't remember their missions until they're told a line of a Robert Frost poem. Dalchimski flees to the U.S. and starts phoning these agents who perform sabotage acts against military targets.
| Writing | Peter Hyams | Screenplay |
| Writing | Stirling Silliphant | Screenplay |
| Directing | Don Siegel | Director |
| Sound | Lalo Schifrin | Original Music Composer |
| Camera | Michael C. Butler | Director of Photography |
| Camera | Kenny Bell | Still Photographer |
| Production | James B. Harris | Producer |
| Writing | Walter Wager | Novel |
| Editing | Douglas Stewart | Editor |
| Production | Pam Polifroni | Casting |
| Art | Ted Haworth | Production Design |
| Art | William F. O'Brien | Art Direction |
| Costume & Make-Up | Luster Bayless | Costume Design |
| Costume & Make-Up | Edna Taylor | Costume Design |
| Art | Robert R. Benton | Set Decoration |
| Costume & Make-Up | Phil Rhodes | Makeup Artist |
| Costume & Make-Up | Del Acevedo | Makeup Artist |
| Costume & Make-Up | Jean Burt Reilly | Hairstylist |
| Crew | Paul Baxley | Stunt Coordinator |
| Crew | Joe Day | Special Effects |
| Lighting | Michael A. Jones | Gaffer |
