Unlike The Shadow, which always used the "Who knows what even lurks in the hearts of men...?" [as far as I know] the Green Hornet's intro went through a bunch of revisions.
The one I actually learned first was a somewhat later one [NPR did not have all of the Green Hornet episodes, and I heard later ones on radio collection CD's while driving with my own children on summer vacations.] It was discontinued in 1940 because J. Edgar Hoover complained about it, but I think it was the most striking of all the Green Hornet introductions:
"He hunts the biggest of all game! Public enemies that even the G-men cannot reach!"