F.B.I. agents David Blair and Thelma Avery are assigned to search for Professor Weiss, who had mysteriously disappeared after discovering an antidote for atomic radiation.
| Actor | Role |
|---|---|
| CCarole WalkerJean Lovering | Jean Lovering |
 Luciano MarinDavid Blair | David Blair |
| GGaetano QuartararoGeorge | George |
| MMary LugerThelma Avery | Thelma Avery |
| PP. CrucianiProfessor Weiss | Professor Weiss |
 Renato TerraElston | Elston |
 Ugo FangareggiNot listed | Not listed |
| SStefano PfauNot listed | Not listed |