| Element | Novel (2012) | Film (2021) | | --- | --- | --- | | | Grizzled, older operative | Younger, romantic lead (Sam Heughan) | | Setting | Multiple European locations | Mostly the Eurotunnel | | Antagonist | Russian oligarchs | Private military company | | Tone | Gritty, realistic, techno-thriller | High-octane, Die Hard-lite | | The "Black Swan" | Refers to a financial collapse theory (Nassim Taleb's concept) | Vaguely referenced as "the weapon" |