Jared Harris

Opportunity is in the air for everyone and Pete meets a stranger on the train.

While the company revels in the glory of its successful Jaguar pitch, Lane reaches breaking point. Plus, Sally is reunited with an old friend.

While Don and the team prepare their pitch for the agency-defining Jaguar account, Joan receives a lucrative offer. Plus, Peggy makes a big decision.

'Tis the season to be jolly, but there isn't much festive cheer to be found at the agency. Harry attempts to help an old friend, while Don and Joan bond.

Roger puts on his entrepreneur hat; Don asserts himself over his colleagues; Sally gets in over her head.

Peggy becomes angry when she is forced to keep a secret she doesn't want to keep; Pete sticks his neck out for a friend; Don receives surprising news.

Walter is forced to relive his past while investigating a series of spontaneous human combustions, while David Robert Jones begins his end game.

Don, Roger and Pete attempt to bring in new business. Sally comes to the aid of a relative.

Peggy deals with relationship trouble and a pitch for Heinz beans. Don and Megan visit potential hotel chain client Howard Johnson's upstate. Jane convinces Roger to experiment with LSD.

While David Robert Jones goes after his next target, Walter visits the Other Side to help the team's counterparts with an investigation into a Fringe case that touches on both worlds.

Don runs into someone from his past. Joan makes a decision, and Roger gives Peggy extra work.

As Sterling Cooper Draper Pryce tries to build upon its current business, Peggy is given new responsibility. Don and Harry indulge a client.

Lane finds a wallet in a cab and decides how to handle it. The fallout from the party leaves Don and Megan upset. Joan has a hard time dealing with her mother.