Don takes a vacation to California with the children and his secretary, Megan Calvet, where he visits the home of his old friend Anna Draper and Disneyland.

During the trip, Don makes a quick decision and proposes to Megan, giving her the engagement ring Anna Draper had bequeathed him.

After impressing them with her ideas, she and Ken sign the account, bringing the agency back from the brink of collapse, but their victory is unappreciated in the wake of Don and Megan's engagement.

"Tomorrowland" was the last Mad Men episode to air for 17 months as heated contract negotiations between AMC and Matthew Weiner began after the season.

Later that morning, Don Draper and Pete Campbell are meeting with the American Cancer Society to discuss potential ideas for a campaign.

Later in the morning, Lane Pryce gives Joan a promotion, adding that it is only a title but promising a raise when the firm has more money.

Meanwhile, Carla permits Glen Bishop to say goodbye to Sally, as Betty and Henry plan to move to the nearby town of Rye.

Unable to get a babysitter on such short notice, Don impulsively asks Megan to accompany them and take care of his children while he attends to business.

Expecting an angry reaction to the mishap, Don and the children are surprised and pleased when Megan calmly cleans up the milkshake and defuses any lingering tension.

At the SCDP offices later that day, Don tells the other partners and Joan about the engagement, receiving their congratulations after a moment of shock.

Joan later talks by phone to her husband Greg, who is shown on an Army base in Vietnam in uniform, and discusses her pregnancy (revealing that she had not had an abortion earlier in the season).

The liquor bottle and the glass they both drank from remain at the countertop for the remainder of the frame, possibly hinting at, finally, some kind of mutual affection, as they clearly still think about each other.

Alan Sepinwall praised the finale and the season, and observed that many of the characters, through their actions (using Don's marriage, Joan's pregnancy, and Betty's firing of Carla and moving out of the Ossining house as examples), were trying to create a fresh start.

"[4] James Poniewozik of Time Magazine enjoyed the episode but was nonplussed by the small focus on the agency storyline, calling it "a pretty big oversight in ending the season, when the second half of it had largely been devoted to SCDP's existential crisis.

Have a Seat' was so unique among Mad Men episodes, and it would have felt artificial to have something that huge happen again to the company itself in the subsequent finale.

Club enjoyed the episode, noting that "however low-key its tone, I think "Tomorrowland" shakes up the status quo as profoundly as 'Shut The Door.