The Green Cockatoo (also known as Four Dark Hours and Race Gang) is a 1937 British drama film directed by William Cameron Menzies and starring John Mills, Rène Ray, and Robert Newton.

[2] It tells the story of an innocent young woman who arrives in London looking for work and, pursued by both criminals and police, is involved in a headlong series of fights and flights.

The Monthly Film Bulletin wrote: "The acting is much more convincing than the plot, René Ray maintaining a bewildered charming innocence throughout and John Mills being pleasantly tough as the owner of a cheap Soho café.

Picture had the proper foundation in a story by Graham Greene, but whole thing collapses in a caricature of pseudo-thugs walking around with their hatbrims pulled down over their eyes, their hands continually in their pockets, etc.

John Mills does the best he can in a James Cagney-type role, even with the songs and dances, American gangster slang, though, Just doesn't sound right coming from him.

Rene Ray is beauteous and has the right wide-eyed stare as the young country lass who unintentionally gets mixed up with all the big, bad gangsters in her first trip to London.