In the midst of a crisis, Don runs into an old friend.

Peggy clashes with her new creative partner; Don pitches under unusual circumstances.

Cutler and Chaough prepare to make radical changes to the firm while Sterling and Draper are visiting a client in Los Angeles. Joan’s decision to go after a new account…

A lion breaks loose in Seattle, leaving a couple’s lives and relationship at risk; Lexie overhears Mark’s discussion about moving in with Julia; Teddy begins to take steps towards coming…

While on a trip to Minnesota, Ted and Barney try anything to make Marshall laugh. Marshall runs into an old nemesis from high school.