Jack CarterPlayed by: Colin Ferguson
A former U.S. Marshal who reluctantly ends up as Sheriff of Eureka. Jack is consistently dumbfounded by the wonders Eureka produces, as well as their propensity to produce things which often threaten the entire town, if not the world. Jack's admittedly simplistic ideas and ability to make intuitive connections between seemingly disparate events often save the day.
Jack: Yeah, I'll deal with that tomorrow.