Detective Baldassarre spends his forced exile sorting criminal records. He gets a chance to return to the line of fire when two people, an aristocrat and a worker are struck by lightning inside a fancy mansion. The incident would be relegated to freak accidents, but Baldassare's attention is drawn to the strangeness of the events and he begins to investigate.
| Actor | Role |
|---|---|
 Marcello MastroianniBruno Baldassarre | Bruno Baldassarre |
 Agostina BelliTeresa Colasanti | Teresa Colasanti |
 Ursula AndressPrincess Anna Dell'Orso | Princess Anna Dell'Orso |
 Peter UstinovHarry Hellman | Harry Hellman |
 Jean-Claude BrialyVan Nijlen | Van Nijlen |
 Mario ScacciaMarino Cianciarelli | Marino Cianciarelli |
 Gianfranco BarraCantalamessa | Cantalamessa |
 Giuseppe AnatrelliCarru | Carru |
| SSerge FrédéricMelzio | Melzio |
| JJean-Patrick JunoyAlex | Alex |
 Luigi ZerbinatiThe 'Debosciato', nephew of Prince Dell'Orso | The 'Debosciato', nephew of Prince Dell'Orso |
| AAngelo MonteNot listed | Not listed |
| MMassimiliano MontiNot listed | Not listed |
| FFrancesco InfantinoNot listed | Not listed |
 Antonio SpinnatoNot listed | Not listed |
 Catharina DahlinEdith (as Caterina Dalin) | Edith (as Caterina Dalin) |
| AAngelo PiazzaNot listed | Not listed |
| PPaola OreficeNot listed | Not listed |
 Nando PaoneConductor | Conductor |
 Jimmy il FenomenoProtester (uncredited) | Protester (uncredited) |