Everything you need to know before watching the final episodes of 'Mad Men'

AMC will begin to air the final episodes of "Mad Men" on Sunday.

If you haven't had a chance to watch the first part of the final season 7, which aired last spring, don't worry, we have you covered.

Before saying goodbye for good to Don Draper and the rest of the gang, here's a refresher of what went down the first half of the final season.

If you haven't watched the first part of season 7 yet, warning: spoilers ahead.