In one of the chemical laboratories in Switzerland, controlled by the CIA, work on a deadly virus — intended for military use — has been completed. Russian intelligence agencies take a special interest in the development and assign mathematician David Bronstein to obtain a sample of the potential chemical threat.
| Actor | Role |
|---|---|
 Igor KostolevskiyNot listed | Not listed |
 Valeri ZhitnikovNot listed | Not listed |
 Yuliya ShifershteynNot listed | Not listed |
 Sergey StyopinNot listed | Not listed |
| SSergey NikitinNot listed | Not listed |