Dr. Sandor Plumb runs The Plumb Clinic, which specializes in treating vertigo. Lucille Austero spent a month at his facility, but a trip in Michael's new car undid all of the progress she made with him. As with the clinic, "plumb" is a construction term for "upright" or "level", or the opposite of vertigo. He is never seen on the show. ("Queen for a Day")