 The episode 's finale is Don 's day and the trip to Plattsburgh and Howard Johnson 's Restaurant and Motor Lodge . As he and Megan eat in the restaurant , Megan expresses her frustration at having her needs and desires take a back seat to Don 's . The discussion escalates into a fight , during which Megan makes a <unk> remark about Don 's mother , and Don storms out and drives off without her . Don returns sometime later and begins to worry when he can 't find Megan . He spends hours looking for and waiting for her , calling Peggy ( the other side of the conversation from the first part of the episode ) as well as Megan 's mother in Montreal . 
