The longest episode of the series.
Jon Hamm won the Emmy Award for Lead Actor in a Drama Series for his performance in this episode. It was his eighth nomination for playing Don Draper and 15th nomination overall, but this was his first win.
Final episode of Mad Men. Production wrapped up on July 3, 2014.
The presence of Halloween decorations in the background throughout this episode indicates that the series finale takes place in October, 1970.
When Don is at the retreat he has a scene with a blonde woman in pig tails and a peasant blouse. A similarly dressed woman is prominently featured in the "Hilltop" ad which ends the series. This is a subtle indication that, in the world of Mad Men, Don created the iconic ad.