GABY GETS A TASTE OF FREEDOM, ON ABC'S "DESPERATE HOUSEWIVES"Julie Benz ("Dexter") Guest Stars"The Chase" - When Celia comes down with the chicken pox, Gaby must keep her distance, on ABC's "Desperate Housewives," SUNDAY, FEBRUARY 28 (9:00-10:01 p.m., ET). Having never had the chicken pox herself, (Read the original story on SpoilerTV)