[1][2][3] Richard Harrison reprised his role as Bob Fleming from Secret Agent Fireball (1965).

Two research scientists are murdered, and the CIA decides to protect their surviving partner.

The CIA smuggles Coleman out of the country to Geneva with Fleming taking his place to discover who is behind the murders.

This opportunity arises when Coleman has plastic surgery to alter his face for his protection.

Fleming contacts the wife in Casablanca explaining the scheme but she demands proof by speaking to her husband by telephone.