Mark your calendars! Showtime's Weeds will be returning to TV for its 4th season beginning on June 16th. The season will consist of 13 episodes and production is scheduled to begin in April. In other Weeds news, star Mary-Louise Parker has gotten engaged to Jeffrey Dean Morgan, who plays her dead husband on Weeds, but is probably better known as Denny "cut my LVAD and make Katherine Heigl a star" Duquette on Greyâs Anatomy. The two dated last year but had split in June. Guess they worked out all of their troubles.