Actor Ben Platt is joined by his sister-in-law, former "Glee" actress Courtney Platt, to discuss his initiative "MS in Harmony", which helps patients achieve harmony of the body and mind through music therapy. "Full Frontal" hostess Samantha Bee stops by to chat. Design week continues with an all-new Backgrounder Design edition, where Drew shares the history of the endlessly chic mid-century modern trends.