A mailman leads PO-men to a pistol-packing stamp thief and her gang.
| Actor | Role |
|---|---|
 Audrey LongClara Kelso | Clara Kelso |
 Warren DouglasBill Mannerson | Bill Mannerson |
 Jeff DonnellApril Shaughnessy | April Shaughnessy |
 Marcel JournetGeorge Zelger | George Zelger |
 Danny MortonFrank Forenti / Tony Cannon | Frank Forenti / Tony Cannon |
 Richard BenedictLouis Reese | Louis Reese |
 Jimmie DoddEddie Waltch | Eddie Waltch |
 Thomas Browne HenryLt. Contreras | Lt. Contreras |
 Cliff ClarkInspector Delany | Inspector Delany |
 Vera MarsheBubbles | Bubbles |
 Peter BroccoBruno Antista | Bruno Antista |
 Patricia KnoxHannah | Hannah |
 Holmes HerbertJames Seeley | James Seeley |
 Jason Robards Sr.Henry Hand | Henry Hand |
 Emmett VoganPost Office Superintendent | Post Office Superintendent |