Eureka kicks off its 4th season with the introduction of new series regular James Callis (Battlestar Galactica) as "Dr. Grant," a former resident of the town whose unexpected return is cause for serious alarm and, considering his romantic interest in Allison Blake (Salli Richardson-Whitfield), significant friction with Sheriff Jack Carter (Colin Ferguson). New and returning fans won’t want to miss the big changes in store for everyone in the small town of Eureka after a cataclysmic shift turns their lives upside down. Eureka also stars Joe Morton, Erica Cerra, Neil Grayston and Niall Matter. Co-creator Jaime Paglia and Bruce Miller are Executive Producers.