Season 6 of Mad Men is the moment the 1960s die and the 1970s begin. It is the season where the optimism of the early 60s curdles into the paranoia and exhaustion of the Nixon era. It is a masterpiece about the end of an era, and the end of a man. Don Draper walked through that doorway in Hawaii. It took a full season to find out what was on the other side: the long, dark night of his own soul. And it is, without question, the finest season of television the medium has ever produced.

The final scene is devastating in its quietness. Don, stripped of his office, his mistress, his wife (Megan moves to California, effectively ending the marriage), and his lie, sits on a bench in a cold, anonymous square. A man sits next to him and asks, “Are you alone?” Don doesn’t answer. The camera pulls back. He is a tiny figure in a vast, indifferent world.

But the season’s true feminist thunderclap belongs to Joan Harris (Christina Hendricks). When the partners vote to take the firm public, they cut Joan out of the decision despite her being a junior partner. She watches the men toast their own enrichment. In the finale, she delivers a devastating line to the new creative director, Ted Chaough: “I will not be treated this way.” She then brokers her own deal, securing her financial future not through a man, but through cold, hard leverage. Joan learns what Don never could: sentimentality is a liability. When she later slaps a male executive for grabbing her, the act is not scandalous; it is a coronation. She is no longer the office manager. She is a shark. No season of Mad Men has ever weaponized history like Season 6. The background is not just wallpaper; it is a third rail. The assassinations of Martin Luther King Jr. and Robert F. Kennedy happen off-screen, but their aftershocks are felt in every frame. The episode “The Flood” is a masterpiece of grief. Don takes Bobby and Sally to see Planet of the Apes as riots consume the city. Bobby asks, “Do we have to move?” Sally, the conscience of the series, replies, “We are not going anywhere.”

The genius of the scene is that it is both a disaster and a liberation. Don Draper, the persona, dies in that boardroom. He is put on immediate leave. His partners look at him not with anger, but with the horror of seeing a naked man in a church. For the first time, Dick Whitman has spoken in public, and the result is professional annihilation. It is the most honest moment of Don’s life, and it costs him everything. While Don implodes, Season 6 is equally the story of how the women of Mad Men finally stop asking for permission. Peggy Olson (Elisabeth Moss) leaves the creative shadow of Don to flourish at CGC, only to realize that a glass ceiling is still a glass ceiling. Her relationship with Abe is a disaster of 1960s idealism clashing with professional reality—ending with him literally being stabbed by her neighbor. It’s darkly comic, but it signals that Peggy has chosen the city, the career, and the power over the commune, the peace, and the man.

The show refuses easy moralizing. Pete Campbell’s mother is lost at sea on a cruise (a darkly comic fate). Roger Sterling, in a fit of LSD-induced introspection, actually finds a sliver of humanity. But the season’s most heartbreaking historical echo is the death of Betty’s new husband, Henry’s political career. He loses the election because of the Democratic convention chaos. Betty, once a cartoon of suburban vanity, has matured into a stoic, weary woman. When she tells Don, “I don’t want to fight anymore,” it is a recognition that the small dramas of their marriage are meaningless against the tide of national tragedy. The season ends not with a bang, but with a whimper—and a revelation. In the finale, “In Care Of,” Don takes his children to see the decrepit whorehouse where he grew up. He points to a window and tells Sally, “I was born in that room.” He then breaks down, and his children have to console him. The parent has become the child.

In a trance, Don abandons the approved copy. He tells the boardroom a true story: as a boy in the brothel, he was so desperate for affection that he would lie in bed, imagining a Hershey bar represented the love of a normal family. He once stole money from a john to buy a chocolate bar, only to have it taken away. The room is silent. The clients are aghast. Don isn’t selling a product; he is publicly confessing to a lifetime of shame.

When the final season arrived a year later, it felt like a denouement—a long, slow walk to the famous Coca-Cola ad. But without the annihilation of Season 6, that ending would have no meaning. We needed to see Don hit absolute zero: fired, divorced, alienated from his children, and stripped of every illusion. We needed to see him sitting alone on a bench, the ghost of a dead soldier on his back.