When Men Betray (1929 film)

When Men Betray is a 1929 American pre-Code crime drama film directed by George Archainbaud and starring George Bancroft, Clive Brook, and Lois Moran. The film was produced and distributed by Paramount Pictures.

The film revolves around a tough harbor boss, Dan Mallory (Bancroft), who rules his territory with an iron fist. He falls in love with a refined woman, Phyllis (Moran), who is also being courted by an undercover police detective, Jack (Brook). Mallory is unaware that Jack is investigating his criminal activities. The story explores themes of betrayal, loyalty, and the clash between different social classes.

When Men Betray was released in both a silent version and a part-talking version featuring synchronized sound sequences. It is notable for showcasing early sound technology and for Bancroft's portrayal of a gruff and powerful character. The film received mixed reviews upon its release, with some critics praising the performances and direction, while others found the plot predictable.

The film is currently considered lost. No complete copies are known to exist, although fragments may survive in film archives.