This episode takes place in December 1967.
Don doesn't speak until seven minutes into the episode although he's in every scene from the start.
This is the first Mad Men episode to be shot digitally. All the previous episodes were shot on film.
The movie Roger refers to when he asks Don, "Did Ernest Borgnine chase you down an alley with a switchblade?" Is the Pearl Harbor set classic, From Here to Eternity (1953).
Peggy tells the minister on the phone: "I think it's going to be Oakland or Houston against Green Bay." This is a reference to what teams will be playing in the Super Bowl, and in fact, the Oakland Raiders defeated the Houston Oilers for the AFL championship, only to lose to the Green Bay Packers in the Super Bowl.