Mad Men returns to AMC in less than a month, and in this new trailer for the upcoming sixth season, Jon Hamm teases the duality of Don Draper while Rich Sommer's Harry Crane sports some fine, fancy threads. Creator Matthew Weiner stresses that the upcoming season will be "a real journey into learning" about Draper.

"It's a lot of our favorite characters doing a lot of different things," says Hamm. "There are two parts of life – the part that is public and the part that is private." Jessica Paré – a.k.a. Megan Draper – hypes the unpredictability of the upcoming season. "It's not what you think is coming," she says. "It's not coming in the way you thought it was coming, and it's probably not coming at all."

New 'Mad Men' Photos: What We've Learned About Season Six

"It's like getting almost to the end of a great book – you want to know how it ends," says Hamm. "This is a novel that doesn't repeat its beats a lot." Season six of Mad Men begins April 7th.