DESPERATE HOUSEWIVES - "Boom Crunch" - Christmas cheer is curtailed when disaster strikes on ABC's "Desperate Housewives," SUNDAY, DECEMBER 6 (9:00-10:01 p.m., ET). Gaby and Lynette's friendship is on the brink of collapse; Susan hatches a plan to help an irrational Katherine; Bree and Orson come to an agreement over their marriage; Danny's vital mistake may cost Angie her freedom; and a plane crashes down on Wisteria Lane, putting lives in peril. (ABC/RON TOM) EVA LONGORIA PARKER, MARCIA CROSS, TERI HATCHER, FELICITY HUFFMAN (OBSCURED), KEVIN RAHM