A dangerous criminal group wants to destroy St. Peter's Basilica and the secret agent James Tont is the only one who can help it.
| Actor | Role |
|---|---|
 Lando BuzzancaJames Tont Agent 007 1/2 | James Tont Agent 007 1/2 |
 France AngladeHelene | Helene |
 Loris GizziMr. Spring | Mr. Spring |
 Claudie LangeClarissa | Clarissa |
 Antonella MurgiaSamantha | Samantha |
 Jacques DufilhoY | Y |
 Geoffrey CoplestonHead of Secret Service | Head of Secret Service |
 Furio MeniconiSpring's Henchman | Spring's Henchman |
| AAldo BonamanoKGB Spy | KGB Spy |
 Mirko ValentinLopez | Lopez |
 Franco ResselJack Clifford - the spaceman | Jack Clifford - the spaceman |
 Renato MontalbanoNot listed | Not listed |
 Enzo ConsoliNot listed | Not listed |
| FFrancesco SormanoNot listed | Not listed |
 Franco GulàNot listed | Not listed |
 Mario De SimoneNot listed | Not listed |
| FFiorella FerreroNot listed | Not listed |