* ActorAllusion: When Carter enters Cyril Kinnear's house, there is a Zulu shield and assegais on the wall. This is an in-joke about Creator/MichaelCaine's first screen success in ''Film/{{Zulu}}''.
* UsefulNotes/BFITop100BritishFilms: #16.
* BreakthroughHit: For director Creator/MikeHodges.
* CastTheExpert: As a young man John Bindon (Sid Fletcher) had been in and out of borstal, and spent most of his adult life associating with criminals, so he was ideally suited to play a gangland boss, despite being young, having intimate knowledge of that world. In the late 1970s his career suffered as he became entangled in accusations of protection racketeering in Fulham and was acquitted of murder at the Old Bailey.
* HostilityOnTheSet: Creator/IanHendry, who plays Eric, was in line for the title role and never forgave Caine for taking it. The onscreen hatred you see is very real.
* MoneyDearBoy: Creator/BrittEkland was afraid of becoming typecast, having already played two gangster's molls before this. She was also reluctant to take the part as she did not want to take her clothes off; however, she had financial problems at the time as a result of bad investment decisions by her accountant. She was later happy that she had been involved with the project.
* PlayingAgainstType: Creator/MichaelCaine, usually the LoveableRogue (at the time), is the SociopathicHero.
** Creator/JohnOsborne relished the role of Cyril Kinnear, seeing it as a chance to shed his image as an "Angry Young Man".
* RealitySubtext: The tension between Carter and Eric Paice (Ian Hendry) was assisted by the fact that Carter was originally going to be played by Creator/IanHendry until Creator/MichaelCaine was hired, much to Hendry's resentment.
* UnintentionalPeriodPiece:
** One of the most dating parts of the film is the porn movie: it is on film, silent, in black-and-white, and Carter watches it on a clattering projector. [=VHS=] reached the UK in 1978, less than ten years after the film's release.
** Names go in and out of fashion. Names like Doreen and Glenda were reasonable names for young women to have in 1970, but 40 years on, they are old lady names.
* WhatCouldHaveBeen:
** Creator/{{MGM}} wanted Creator/TellySavalas for Cliff Brumby.
** Creator/MichaelCaine and the producer wanted a CarChase, but Creator/MikeHodges refused, feeling it was too similar to ''Film/{{Bullitt}}''.
** The studio considered Creator/JoanCollins for a role.
* WorkingTitle: ''Bent'', ''Carter'', ''Here Comes Carter'' and ''Carter's the Name''.
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