Dr. Henry Deacon (Joe Morton) is the town jack-of-all-trades. Although, like most residents of Eureka, he is a brilliant multidisciplined scientist, Henry has ethical objections to the kind of research conducted at Global Dynamics, preferring employment as the town's mechanic. Henry's assistance is often invaluable in defusing the situations the experiments in town create. He was destined for incarceration, following a false biohazard scare to distract him from trying to free Allison's son (Kevin) from the Artifact leading to the escape of Beverly. However, he was eventually granted a reprieve and remained in Eureka. During Season 3, he was elected Town Mayor as a write-in candidate.