Sci Fi has ordered a third season of Eureka, the channel's most-watched original series.

Production on the new thirteen episode run will start early next year for a summer 2008 premiere.

"Eureka rose to an even higher creative level in its sophomore season, combining entertaining, compelling stories with deeper character development and great cast chemistry," said Mark Stern, executive vice president of original programming at Sci Fi. "Clearly the audience noticed, bringing millions of new viewers to the channel."

Eureka's series premiere back in 2006 remains Sci Fi's most watched programme ever. It performed particularly strongly during its second season in the 25-54 demographic, posting a season high of 1.6m demo viewers towards the end of August.