Mad Men is finally returning in one month, and new photos from the set continue to pique our interest. The big spoiler from these is that Harry Crane (Rich Sommer) gets groovy.

Paul Kinsey (Michael Gladis) went Hare Krishna last season, so it isn't the first time the counterculture has hit Mad Men. (Remember Don's hippie mistress from the first season who turned into a heroin addict?)

The photos also show Don (Jon Hamm) looking dapper as ever and driving around in a vintage (well, it's not vintage for them) Mustang convertible with Harry and Roger (John Slattery). We wonder how the elder statesmen of Sterling Cooper Draper Pryce (are they dropping the Pryce now?) will take all this. The Seventies are coming, whether they like it or not.

Mad Men returns to AMC on April 7.

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[via Vulture]