13 episodesFirst aired 25 July 2010
Season four takes place between November 1964 and October 1965. It is set at the new and considerably more modern advertising agency, Sterling Cooper Draper Pryce. The main narrative of the fourth season is driven by Don Draper's identity crisis. As Don falls deeper into existential despair, he begins regularly meeting with women of loose moral character and faces debilitating alcoholism.
E1Jul 201048m
Don deals with a trade-paper interview but doesn't want to talk about himself. A manufacturer of a "wholesome" two-piece bathing suit wants to hire the firm but doesn't want anything too risque. Pete and Peggy try to secure more money for the firm.
E2Aug 201048m
The agency's Christmas party is nearly spoiled by the late arrival of a surprise and not-so-welcome visitor.
E3Aug 201048m
Don takes a trip. Joan has scheduling problems. Don and Lane get to know each other a little better.
E4Aug 201048m
An edict from Roger and Lane puts Pete in a personal dilemma.
E5Aug 201048m
Don and Pete disregard Roger's plans in order to land a new client.
E6Aug 201048m
Peggy clashes with her new creative partner; Don pitches under unusual circumstances.
E7Sept 201048m
A deadline disrupts Sterling Cooper Draper Pryce.
E8Sept 201048m
Joan and Peggy deal with high-jinx in the office.
E9Sept 201047m
Peggy is forced to face some unpleasant facts about a client's discriminatory business practices. Don and Faye's burgeoning relationship is tested when Sally runs away from home and turns up at the office. Roger tries to rekindle his affair with Joan.
E10Sept 201048m
An unannounced visitor at the Francis home rattles Betty.
E11Oct 201048m
Sterling Cooper Draper Price employees resort to scuttlebutt after an agency wide meeting is called.
E12Oct 201048m
In the midst of a crisis, Don runs into an old friend.
E13Oct 201048m
Don and Peggy are faced with life-altering decisions.