* EnforcedMethodActing: Ian Hendry, 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.
* HeyItsThatGuy: [[CoronationStreet Alf Roberts]] [[spoiler: takes a flying lesson.]]
* PlayingAgainstType: Michael Caine, usually the LoveableRogue (at the time), is the SociopathicHero.
* RealitySubtext: The tension between Carter and Eric Paice (Ian Hendry) was assisted by the fact that Carter was originally going to be played by Ian Hendry until Michael Caine was hired, much to Hendry's resentment.