DESPERATE HOUSEWIVES - "School of Hard Knocks" - After disobeying the rules of student drop-offs at the front of Juanita's school, Gaby makes it her mission to get even with a parent volunteer who banishes her to a faraway parking lot; Bree discovers that daughter Danielle's new business may not be as wholesome as first thought; Lynette begins to suspect that Tom may be dating; and Susan tries to ease her guilt by taking an art class with no-nonsense instructor Andre Zeller (Miguel Ferrer), on "Desperate Housewives," SUNDAY, OCTOBER 16 (9:00-10:00 p.m., ET) on the ABC Television Network. (ABC/RON TOM) RUBY LEWIS