Losing Lucky Strike has left Sterling Cooper Draper Pryce weak and gasping for air in Season 4, Episode 12. But, as research king Geoff Atherton says, the agency still has Don. Don proves himself again as he makes a bold move to change the agency's fortunes. Whether it works will be subject of the season finale.

Early in the episode when the agency appears to be crashing down and Don doesn't know what to do, Peggy reminds him that he always said that if you don't like what people are saying about you, change the conversation. Don, the self-made man, can't just let fate have her way with him. He has to do something.

"It's the end of the world." The word gets out that Sterling Cooper Draper Pryce has lost Lucky Strike, and everyone at the agency is shaken in Season 4, Episode 11. Don vows that things will be OK, but nobody is sure that the agency will survive.

And anyone who has been through the economic downturn of the past couple of years knows what the SCDP people are feeling when they watch as their company's fortunes take a horrible turn for the worse and they don't know whether they'll be out of a job soon. It's frightening, but oddly exhilarating, too, as Stan the pig says, "It's the last days of Rome. ... The energy is very good."

Secrets come out and secrets stay hidden in Season 4, Episode 10. Don, Roger, Lane and Pete see their worlds start to crumble. And at least three of them engage in stunning displays of spinelessness. The one who shows some backbone is most surprising.

The 1960s references are everywhere in this episode. Don gives Sally a thrill when he tells her that he'll be taking her to the Beatles' concert in Shea Stadium (Aug. 15, 1965); Lane takes guests to the Playboy Club; the Cold War and the space race are key to a client's business; women sit in a doctor's waiting room to get an illegal procedure; someone makes the casual offer of a Valium; "Hazel" is playing on a television set. Yet it is the past that makes the biggest impact in this episode.

Big fat spoilers ahead about this packed episode.
 

Pete (Vincent Kartheiser) and Peggy (Elisabeth Moss) took center stage in Season 4, Episode 4. Each of them has a private moment of headbanging frustration.

Do I need to warn you about spoilers? Good. Let's go.