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.
The episode occurs roughly two weeks after the previous one--around the time of Charles Whitman's shooting rampage at the University of Texas Austin. Pete and Trudy host a dinner party in the suburbs, attended by Don, Megan, Ken, and his wife. Pete also attends driver's education classes where he views the film, Signal 30, and flirts with a young woman. Lane attempts to land an account with Jaguar Cars, leading to a physical altercation with Pete.moreless
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.
Megan throws Don a surprise birthday party, the war between Pete Campbell and Roger Sterling intensifies, and new mother Joan begins to wonder if she still has a job when she's ready to come back.moreless
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.
The dying Observer comes to see Walter and Peter, who must take extreme measures to learn what secrets he hides and determine if he knows where Olivia is. Meanwhile, David Robert Jones tries to force Olivia to use her cortexiphan abilities by torturing Nina.moreless
The Fringe Division of the Other Side must deal with both a visit from Peter and a new enemy, who is preparing a worlds-spanning operation to gain the mineral he needs to provide energy for his master plan.moreless
While Olivia and Lincoln try to return Peter home, they try to cope with the looming threat of the transparent shapeshifters. Meanwhile, a traitor is revealed and an old enemy emerges from the shadows.moreless