A greasy spoon diner provides a base for a spy smuggling nuclear secrets.
| Actor | Role |
|---|---|
 Terry MooreKotty | Kotty |
 Frank LovejoyProf. Sam Bastion | Prof. Sam Bastion |
 Keenan WynnGeorge | George |
 Lee MarvinSlob / Mr. Gregory | Slob / Mr. Gregory |
 Whit BissellEddie | Eddie |
 Jess BarkerArtie | Artie |
 Donald MurphyPope | Pope |
 Frank De KovaProf. Claude Dillon | Prof. Claude Dillon |
 Len LesserPerch | Perch |
| FFred GabourieLookout | Lookout |