AMC’s first teaser for the upcoming fourth season of Mad Men reveals about as much as the previously released poster and promotional still… which is to say, it reveals nothing. Instead, it plays sort of like a 30-second YouTube fan mash-up of our favorite moments. There’s Don smoking that cigar! (You want to shout: “Don’t take up with that teacher who’s name we can’t remember, Don… she’s not worth it!”) Look, it’s Pete and Trudy’s wacky dance! OMG, Joan smashing that vase! Peggy under the sheets! Betty in Rome!!! July 25 cannot come soon enough.