"What's to Discuss, Old Friend" is the 167th episode of the ABC television series Desperate Housewives. It is the tenth episode of the show's eighth season and was broadcast on January 8, 2012.

With Mike gone, Susan attempts to build a car for MJ's father-and-son school soapbox derby; Bree's attorney, Trip, learns of her previous drunken sexual spree and needs her to come clean about it in order to help strengthen her case; Lynette tries to cause some negative friction between Tom and his girlfriend, Jane, by flirting with his boss and getting him to pile more work on her estranged husband; Gaby is furious with Carlos when he tries to poach one of her rich, personal shopper clients (Doris Roberts) and talk her into helping with his newly formed charity organization; and Renee discovers that Ben is keeping a secret from her about his involvement with Bree -- and the body found at his work site.