The movie is a homage to '60s British cinema, particularly
Michael Caine movies of that period. The lead character of the assassin calls himself "Matthew Palmer", after Harry Palmer of
The Ipcress File (1965), and his band is called "The Ipcress Files". The lead assassin who confronts Palmer at the film's climax is called "Mr Carter", in reference to
Get Carter (1971). And in the interview bar scene between Palmer and Lance, a painting of Michael Caine is seen in the background.
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