Although first introduced as the local mechanic, the proprietor of Henry's Garage doesn't actually work on cars all that often. Being one of the most brilliant people in a town of brilliant people, Henry Deacon is Eureka's jack-of-all-trades, routinely solving unique problems in a wide variety of fields.
Velcro-backed fabric badges, in varying states of faux greasiness.
From VIP Fan Auctions & NBC Universal.
