http://www.avclub.com/tvclub/mad-men-field-trip-203894

This makes sense, because “Field Trip” is about that very fundamental sense you get when you just want someone to love you the way they’re supposed to, only to realize that they just don’t. Don Draper was used to being the center of life in the office in a way he no longer is, while Betty Francis is supposed to be beloved by her children in a way that she never was. (It’s too late for Sally, and she’s losing Bobby. Gene will be gone to her soon enough.) Megan believes that Don is her husband, not her manager or father, only to find, cruelly, that he’s just in Los Angeles to reprimand her about how she handled an audition. And we rarely feel as lost as we do when we’re supposed to feel love but, instead, get only cold shoulders and confused expressions at our very presence.