SCDP engages in business “of a higher level,” Joan becomes a partner, and Peggy moves out from Don’s shadow in episode 511.

Betty reveals Don’s past to Sally, Don attempts to regain his creative spark, and Pete deals with his failures in episode 509.

Pete finds something “on the side” and Megan leaves the agency, causing friction between Don and Peggy.

The cast and crew of Mad Men explore the tentative nature of business relationships in episode 505.

Jon Hamm, Director of “Tea Leaves,” examines Betty’s cancer scare and its link to the theme of youth in episode 503.

Costume Designer Janie Bryant lays out the key costumes of the premiere, showing how the openness of the late ’60s is creeping into the show.

Matthew Weiner and the cast examine the tumultuous time period the show is entering and where each character stands at the start of season 5.