When does King of the Hill return?

The series centers on the Hills, an American family in the fictional city of Arlen, Texas, as well as their neighbors, co-workers, relatives, classmates, friends, and acquaintances. The show's realistic approach seeks humor in the conventional and mundane aspects of everyday life, such as blue-collar workers, substitute teachers, and the trials of puberty. It was named by Time magazine in its 2007 list of "The 100 Greatest TV Shows of All Time"
The show centers on the Hill family, headed by the ever-responsible, calm, hard-working, loyal, disciplined, and honest propane and propane accessory salesman Hank Hill. The punning title refers to Hank as the head of the family as well as metaphorically to the children's game King of the Hill. Hank typically serves as the de facto leader for his friends and family. Hank has a strained relationship with his mother, Tilly, a kind woman who lives in Arizona.