Enter Inspector Duval

Enter Inspector Duval is a low budget 1961 British crime film directed by Max Varnel and starring Anton Diffring, Diane Hart and Mark Singleton.[1]

A French policeman, Inspector Duval, is brought to London to help his British colleagues crack a case. The investigation concerns the murder of a socialite during a jewel theft. However, it turns out Inspector Duval has ulterior motives. It was based on a story by Jacques Monteux.[2]