When Weeds premieres its sixth season on August 16, Nancy and company are on the run after Shane murdered Pilar with a croquet mallet. (These things happen to the Botwins.)According to Entertainment Weekly, a pair of familiar faces with be joining the family on the Showtime hit.Linda Hamilton, the original Sarah Connor, will portray an eco-conscious marijuana grower. Along with her life partner, this character will helps Nancy settle in Seattle.Also, Peter Stormare (Prison Break, Entourage) will play a hot-…