Sean Dillon is a fictional Irish character who is the hero of a series of Jack Higgins novels.
An excellent gunman and a good actor, he very soon earns the nickname "The Man of 1000 Faces" from the British, who dread him.
Soon after joining Group 4, it is revealed that Dillon's capture by the Serbs was actually set up by Brigadier Charles Ferguson.
Dillon — an expert pilot and scuba diver as well as a master of disguise and languages — subsequently becomes Ferguson's most effective agent, at one point even foiling an assassination attempt upon the prime minister and the president of the United States.
Dillon soon meets Ferguson's right-hand woman Hannah Bernstein, and is slightly romantically inclined towards her.