Matthew Modine by Stephen Lovekin/WireImage.com Matthew Modine by Stephen Lovekin/WireImage.com
Weeds is sweetening the pot in its third season. Sources confirm that Matthew Modine is joining the cast for a 10-episode arc. He'll play a real-estate developer who's building a new community next to Agrestic. And in between bong hits, he'll be romancing both Mary-Louise Parker and Elizabeth Perkins - although probably not at the same time. The show's called Weeds, not Nip/Tuck.