The inclusion of the Beatles' "Tomorrow Never Knows" at the end of the episode marked this season's second reference to the Tibetan Book of the Dead. With bardo (the transitional state between death and rebirth) serving as a metaphor for some of the show's main characters, suddenly Mad Men is morphing into Lost with its intertextuality—a term that was actually coined by poststructuralist Julia Kristeva in 1966, the year in which this season is taking place. How meta! And metaphysical!
In the opening scene, Pete is mid-commute when he's bothered by his train buddy Howard, a life insurance salesman trying to make a pitch. Pete cuts him off, saying quite ominously, "It came with my junior partnership. It's six times my annual salary, and after two years, it covers suicide." And there it is: Within the first five minutes of the episode we're bludgeoned with another "hint" that someone might be killing his/herself this season. Would the writers be so obvious in their suggestion that it will be Pete?