Recruited against his will into the USA’s top spy organisation, and then framed for murder, Thornhill is a man on the run, completely clueless as to why he’s running and what exactly from. A reluctant, self-made spy, then.
Though his idea of undercover generally involves shoving on a pair of shades (that’ll fool ‘em Cary!), his gentlemanly charms are generally what gets him through. He’s also not bad with the words… “I've got a job, a secretary, a mother, two ex-wives and several bartenders that depend upon me, and I don't intend to disappoint them all by getting myself slightly killed.”