The evil crime syndicate Thanatos is bent on taking over the world, using a magnetic wave generator that will cause all metal-based machinery to grind to a halt. However, the well-known British secret agent normally assigned to such tasks isn't available, so they engage his civilian brother, Neil, to help. Neil, played by Neil Connery, is a world-class plastic surgeon, hypnotist, and lip-reader, which turn out to be precisely the skills required for thwarting Thanatos.
Unfortunately the movie Operation Kid Brother is not yet available on HBO Max.
| Directing | Alberto De Martino | Director |
| Writing | Paolo Levi | Screenplay |
| Writing | Paolo Levi | Story |
| Writing | Frank Walker | Screenplay |
| Writing | Stanley Wright | Screenplay |
| Writing | Stefano Canzio | Screenplay |
| Production | Dario Sabatello | Producer |
| Sound | Ennio Morricone | Original Music Composer |
| Sound | Bruno Nicolai | Original Music Composer |
| Crew | Giovanni Bergamini | Cinematography |
| Editing | Otello Colangeli | Editor |
| Editing | Alejandro Ulloa | Color Assistant |
| Art | Franco Fontana | Art Direction |
