Jon Hamm Jon Hamm

[WARNING: The following story contains spoilers from Sunday's Mad Men. Read at your own risk.]

"The moon belongs to everyone. The best things in life they're free."

The coup led by Roger Sterling in Mad Men's midseason finale may not be as impressive a feat as the Apollo 11 crew landing on the moon, but both could have easily ended in disaster. And while both missions were successful — though in the case of Sterling Cooper & Partners, with one casualty — Don Draper is reminded once again that success isn't the only thing that matters.

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While the nation was anxiously waiting to hear (and see) if Neil Armstrong & Co. would make it to the moon, Don (Jon Hamm) was dealing with his own crisis. Just days before his triumphant return to glory in the Burger Chef pitch meeting, Jim Cutler (Harry Hamlin) fires Don for breach of contract for his stunt during the Commander cigarette meeting. Don storms into Jim's office, where the men exchange heated words ("You're just a bully and a drunk ... a football player in a suit," Jim says) before Don calls an impromptu partners' meeting in the middle of the office. Most of the original Sterling Cooper contingency  (save for Joan, who's tired of Don costing her money) vote against Cutler's underhanded maneuvering in this situation, which grants Don a temporary stay of execution. 

Reading the writing on the wall, Don calls Megan (Jessica Pare) to share the bad news. However, when Don suggests that he'll now have the chance to move to Los Angeles as Megan had hoped, she is hardly welcoming. In fact, during the course of their conversation, it becomes clear what's been coming for months. Their marriage is over, and although Don wants to take care of Megan as long as she needs, she's ready to move on.

Back at the office, Roger (John Slattery) goes to Bert Cooper (Robert Morse) to bemoan Cutler's slow takeover of the company. And even though Bert voted against Cutler firing Don, he appreciates Cutler's vision for the firm's future and doesn't seem to actually want Don around. "No man has ever come back from leave -- not even Napoleon," Cooper says, making sense of the episode's title, "Waterloo." But will this be Don's last battle? 

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When Roger shares his master plan with Don, Don doesn't seem impressed. (After all, he has turned down working at McCann at least twice.) "I just want to do my work. I don't want to deal with business anymore," Don says. Undeterred, Roger takes the idea to the partners, most of whom marvel at the boatload of money they will earn by selling out. (Poor Harry Crane hadn't signed his deal yet, so he's not a partner, and therefore, locked out again.)

There's just one sticking point: Ted wants out, so signing a five-year contract sounds like madness. And now it's Don's turn to pitch. Don, who despite his personal differences with Ted, knows the way his creative mind is wired, appeals to his desire to do good work. Don also makes sure to point out all the crap he's endured this season just to stay in the game. "You don't have to work for us, but you have to work," Don says. "You don't want to see what happens when it's really gone."

With that, Ted is on board. And, hilariously, so is Cutler. ("It's a lot of money!" he insists when Roger questions him.) Don leaves the meeting, job secure for now, and learns from Peggy that they won the Burger Chef account. "They saw what I saw," Don says as he gives his protégée  a congratulatory hug before heading back downstairs. "Back to work," he says.

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