Why does Mad Men keep introducing new relationships we don't care about?

[TMC]

http://www.slate.com/articles/arts/t...tionships.html

"Mad Men has a long tradition of zooming out when you're expecting it to zoom in," says John Swansburg, "bringing in some new character or storyline or milieu right when things seem to be getting interesting with the core characters in whom you have an actual investment." PLUS: All of Don's women are mirrors of his sad existence, it was thrilling to see Pima and all the clout she had, and Jay R. Ferguson talks Rizzo and his beard.