Trivia

While filming a night scene in Piccadilly Circus, Writer and Director Michael Winner set off an unannounced smoke bomb, causing horrendous traffic jams, after which he sped off in a taxi with the film magazine, leaving other members of the crew to be arrested. This incident caused such resentment that for many years afterwards permission to film there was denied. John Landis' "An American Werewolf in London (1981)" was the first to be allowed to do so.

Theatrical movie debut of Kenneth Colley (De Winter).

The first of three Michael Winner movies in which James Donald was featured.

A cleaner at the Old Bailey (the Central Criminal Court) acted as a stand in for Michael Crawford putting the Crown Jewels in the "Scales of Justice."

The title song was performed by Peter and Gordon.