DESPERATE HOUSEWIVES - "Lovely" - Susan causes quite a stir when she invites a former stripper into her home on ABC's "Desperate Housewives," SUNDAY, FEBRUARY 21 (9:00-10:01 p.m., ET). Former exotic dancer Robin will have a profound effect on Susan's friends -- with three teenage boys at home, Lynette will keep a watchful eye; Bree picks up a few tricks to engage Orson; Gaby looks for help with troublesome niece Ana; and Katherine will find a friendly companion. (ABC/ERIC MCCANDLESS) MARCIA CROSS, ORSON BEAN, KATHRYN JOOSTEN