The Sci Fi Channel's quirky series returns for a third season, as small-town Eureka sheriff Jack Carter (Colin Ferguson) continues to unravel the mysteries of Eureka's super-genius community and its top-secret research facility, Global Dynamics. Salli Richardson returns as government go-between Allison Blake, and Frances Fisher joins the cast as "The Fixer" Eva Thorne, on assignment to straighten things out at Global Dynamics.