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

“You look radiant, Joan.” Janie Bryant explores her costume choices for Joan, Megan and Peggy in episode 511.

In “Christmas Waltz,” Lane’s ego takes him to the point of no return, while Don tries to prove his worth to the team.

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.

Costumes aren’t just for women. Janie Bryant breaks down the men’s “uniforms”, and how they have and haven’t changed over the years.

Peggy and Abe decide to move in together, Megan saves the Heinz account, and Sally sees the dirty side of the adult world in episode 507.

Peggy has her first solo presentation, Roger and his wife take LSD, while Don and Megan’s get away doesn’t end quite how they expected.

Costume Designer Janie Bryant breaks down why Don’s sports coat in episode 505 is not his normal wardrobe.

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