Southside 1-1000 is a 1950 semidocumentary-style film noir directed by Boris Ingster featuring Don DeFore, Andrea King, George Tobias and Gerald Mohr as the off-screen narrator.

[1] Based on a true story, it is about a Secret Service agent (DeFore) who goes undercover and moves into a hotel run by a beautiful female manager (King), so that he can investigate a counterfeiting ring.

A narrator explains the crucial role of paper currency in underpinning trade in the economy, and how the US Treasury Department ensures it is safeguarded by tracking down counterfeiters.

[3] A November 1950 review in The New York Times commented: "In the cinema's library of routine gangster fiction, Southside 1-1000 merits a comfortable middle-class rating being neither especially exciting nor particularly dull".

Given director Boris Ingster's impressive work on the seminal Stranger on the Third Floor, one expects something a bit more unusual or off the beaten path – or at least distinctive.