AllMovie

Warren Douglas is Post Office Investigator Bill Mannerson in this diligent Republic programmer. Top billing, however, is awarded to Audrey Long as villainess Clara Kelso. The "maguffin" is a collection of rare stamps, which the baddies attempt to steal from stalwart Mr. Mannerson. Aiding and abetting the hero is his spirited fiancee April Shaughnessy (Jeff Donnell). The film's most interesting performances are rendered by Marcel Journet as a cosmopolitan criminal mastermind and former boxer Richard Benedict as Journet's deaf-mute henchman. Originally clocking in at 60 minutes, Post Office Investigator seems to be brisker and more entertaining in the 48-minute version prepared for television.