Marketplace launches our 39th season with a special one-hour episode that takes on Canada's major store chains. Just how bad is their customer service? We reveal frustrating shopping experiences on hidden camera, commission a poll -- where Canadians tell us which stores are the worst -- and we name names. Then, we put professional secret shoppers to work across the country, documenting just how bad customer service can be. Even host Erica Johnson can't believe what she finds, shopping at the three stores rated worst. Complaining experts weigh in, and stores react when we reveal who wins at being worst.