Some viewers find the pacing a bit slow once the action moves from the heist to the circus investigation. While the mystery offers several red herrings, modern reviewers often find the twists somewhat predictable.
The circus provides a rich, "fog-soaked" backdrop filled with suspicious characters, including: Il Lungo Coltello Di Londra 1966
The film opens with a high-stakes armored car robbery on London’s —a sequence noted by reviewers for its impressive, nearly silent execution. When a member of the gang is murdered by a throwing knife, the investigation leads Inspector Elliott (Leo Genn) to the winter quarters of Barberini's circus. Some viewers find the pacing a bit slow