This is a real mixed bag of a film, which could have been a lot better if the screenplay had been kept more taut and tense. The basis of Graham Greene's novel is certainly there, as are some of the characterisations with Rene Ray as wide-eyed innocent in the big city, and Robert Newton playing a low-key role to good effect. There's even TV's Fabian of the Yard, Bruce Seton, playing a gangster. The one major cuckoo in the nest is John Mills, who is quite hopelessly miscast in the lead role. He comes across as a watered down, British version of James Cagney! In a long and distinguished film career, this is probably his most forgettable performance. The changes in his accent are pretty hilarious, and some of the dialogue phony, to say the least. On the plus side, the photography is impressive, in that an atmosphere of the dingy side of the city is invoked, and the gangsters look suitably menacing. And, it could be said to be a forerunner of the later film noir series from the USA. Unfortunately, as other reviewers have pointed out, it is too talky with not enough action, and could have been a lot better given the talent at its disposal.