It’s somewhat ironic to say Hercules Mulligan needs no introduction since he is one of the lesser-known historical figures in the show.

He did, however, show remarkable resilience at a time when even being suspected a spy might result in his death. Despite being an out-spoken member of the Sons of Liberty, he still got useful intelligence. From The CIA’s Studies in Intelligence: I Keep Me Ears Open:

… it seems all the more incredible that the King’s soldiers would even patronize his shop, let alone engage him in conversation that could suggest Tory intentions. It is not, however, as if they did not at times suspect the tailor […] Mulligan was arrested twice by the occupying forces, once at the say of Benedict Arnold. But between the traitor Arnold’s lack of evidence and Hercules' natural proclivity for the blarney, he was each time set free.

You lock him up, he gets the fuck back up again