Vincent Kartheiser Vincent Kartheiser

As Mad Men begins its seventh and final season, there's a certain amount of reflection in the air.

In the exclusive behind-the-scenes video below, Vincent Kartheiser looks back at the journey of his character Pete Campbell. "Pete has generally gone through what most men go through between 25 and 35: They become men," he says. 

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For Pete, becoming a man has included marrying Trudy (Alison Brie

), becoming a father, and working his way into a partnership at Sterling Cooper Draper Pryce Sterling Cooper & Partners. But in Season 6, Pete blew up his personal life by having one affair too many. So, has Pete learned from his mistakes?"Oftentimes you have a life-changing moment and it changes you temporarily," Kartheiser says. "And [for] some people it changes permanently. If they're smart and if they're wise and if they're crafty, they learn where they fit in this world. And they tolerate their role and they accept it."But will Pete be able to accept his new situation or will he keep striving for more? We'll find out when the new season of Mad Men kicks off on Sundayat 10/9c on AMC. In the meantime, watch the video below: