'Mad Men' Final Season: A Look at the Series By the Numbers

“Mad Men” begins its final run of episodes on Sunday. It’s hard to believe, but our introduction to Don Draper and his dapper Sterling Cooper colleagues was more than seven years ago now. That’s a lot of cigarettes in the office.

How many? Glad you asked.

For the end of a show that redefined attention to detail, here’s an obsessive look at the numbers behind “Mad Men.” (And don’t forget zero, the number of fans who have the answer to what may be the biggest mystery in TV today: How Don’s story will end.)