Mad Men Season 7 spoilers What does "Mad Men" have in store for Peter Campbell during Season 7? Photo: Frank Ockenfels 3/AMC

Fans of the hit AMC series “Mad Men” will be welcoming back the boys of Sterling Cooper & Partners when the drama airs its Season 7 premiere on Sunday at 10 p.m. EDT. Excited? We are, too! Especially because episode 1, “Time Zones,” is rumored to be pretty spectacular.

According to the official synopsis for the Season 7 premiere, “Mad Men” fanatics will be brought up to date on their favorite characters. “Don makes a friend, Joan has drinks with a client, Roger receives a perplexing phone call and Peggy hears new work.” Sounds pretty vague, right? The more ambiguous a synopsis is, the more curious we get. That’s why we decided to scour the Web for clues of what to expect when “Mad Men” returns.

Our investigation began with a character not mentioned in the episode outline: Pete Campbell. When we last saw Vincent Kartheiser’s character, he was struggling with a messy split from his wife Trudy. Apparently, Pete just couldn’t help himself when it came to fooling around with other women.

“All I wanted was for you to be discreet,” Trudy told her husband in Season 6. She even let Pete have a bachelor pad in Manhattan so he would indulge in affairs away from their home. “She lives on our block! We’re done, Peter.”

Yikes. With that said, you think Pete would begin Season 7 looking a bit blue.

On the contrary! According to spoilers, Pete will begin the new season on an extremely sunny note—with a little help from his new life in California.

"Sometimes a clean slate is the best place to be because you can reinvent yourself," Kartheiser told TV Guide. "The hope of that is invigorating. For a little while, you can fool everybody."

For a little while, but not for long.

“He's making a good show, but I think most of it's a cover,” the actor said. And we concur.

During an exclusive behind-the-scenes video, Kartheiser gave more insight of what’s to come for his character during the show’s final season.

"Pete has generally gone through what most men go through between 25 and 35: They become men," he revealed. But has Pete really grown up?

"Oftentimes you have a life-changing moment and it changes you temporarily," he explained. "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."

Will Pete really be able to accept his new role as a single advertiser? He always strives for perfection, so we can’t wait to see what happens when his character makes his Season 7 debut. How long do you think Pete can keep up his calm façade? Let us know in the comments section below.