When’s everything going to go back to normal? Roger's question to Don is really more of a plea. Both Roger and Don know the answer is "never." This is epitomized by the two additions to the cast: Teyonah Parris as Don's Secretary Dawn, the black person they hired because of last episode's joke exchange with Young and Rubicam and Ben Feldman as Michael Ginsberg, the Jewish socially-stunted-but-talented copywriter who lives with his father. Another "addition" to the cast, of sorts, was the 40 pounds gained by Betty. "Fat Betty" was, of course, a tool show creator Matt Weiner used to take advantage of the fact that January Jones was pregnant during the shooting. Jones was not that heavy during the time, but the makeup and costume folks effectively added more pounds. The episode IMHO emphasized the encroaching generation gap of the 1960's. We see 40-year-old Don struggling with having a 25-year-old wife, dealing with the worldly teen Bonnie played by the talented Hayley McFarland ("Lie to Me"), and then coping with the possibility that ex-wife Betty might have thyroid cancer. Part of theme is the relationship between age and the truths that "life goes on" and "everyone can be replaced." While Roger is feeling replaced, Betty imagines life going on without her and Don struggles with how that could happen. Peggy, on the other hand, represents the generation that doesn't see that fear of the future. She has no problem recruiting a talented copywriter despite Stan's warnings about the competition. But then she was thrown a bit about Ginsberg's surprising skill at becoming someone else in the final interview with Don. Megan also represents the generation that embraces its future. But the "Betty has cancer" phone calls discussion confuses her view of things by hinting that Don's "baggage" could become quite heavy. And she has to lose her "I'm working here" mindset at dinner with the older Heinz couple by tactfully agreeing with the wife that work talk is boring. Then we have The Rolling Stones, except we don't. Don looks and acts like "The Man." In Don's interaction with Bonnie we clearly see him shift to a Sally-Draper's-father mindset. Bonnie defines the generation gap from her point of view, “None of you want any of us to have a good time because you never did.” Don, the parent, simply says, “No, we’re worried about you.” Don and Harry were there to get The Stones to be the music for a Heinz beans commercial. Harry unknowingly ends up having hired the warmup act because neither of them have ever seen The Stones. And The Stones lyrics we're getting here insists "Time is on my side, yes it is, yes it is." In the end, the very end, the truth is time isn't on anyone's side. Note: Talk about how things were with the invisible minorities, I couldn't find one picture of Teyonah Parris as Don's Secretary.