Former Twin Peaks G-man Kyle MacLachlan most recently the star of ABC's now-adjourned legal drama In Justice is joining the cast of Desperate Housewives on April 16 for a multiepisode arc. "Hes a lovelorn, single dentist who is trying to make a connection with Susan," says executive producer Tom Spezialy. "Shes already entangled with her ex-husband and Mike, so hes very much the fourth wheel in this situation." MacLachlan will appear in a handful of episodes and its possible he could return in the fall. "It depends how he plays," says Spezialy. "I would think he would fit in nicely in our world." Another variable: ABC hasnt officially canceled In Justice. Not sure what they're waiting for.