"Mad Men": Behind the scenes for season six

(CBS News) If you're one of the millions of "Mad Men" fans left wondering what happened to your favorite chain-smoking, whiskey-swigging and fidelity-challenged employees at Sterling Cooper Draper Pryce when season five came to an end, the long wait is finally over.

The Emmy-Award-winning drama about a New York advertising agency in the 1960s kicks off its sixth season with a two-hour premiere.

Since it's been almost a year since there has been a fresh episode of AMC's "Mad Men," Sunday night's episode has a lot to live up to, and the men of the show say fans will not be disappointed.

"CBS This Morning: Saturday" host Anthony Mason spoke with Vincent Kartheiser (Pete Campbell), Aaron Staton (Ken Cosgrove), Jay Ferguson (Stan Rizzo) and Ben Feldman (Michael Ginsberg) about what the show has done for them and what to expect from their characters this season.

For all four men, the thought that this is the second-to-last season of the show was a little sad but they also acknowledge how far "Mad Men" has taken their careers and how lucky they were to have been a part of it.

"Everybody knew the show was special, but I don't know, you know, even if you read a great script, it doesn't guarantee you another episode," said Staton. "So the business is unpredictable, but here we are six seasons in and I'm still here."

Being on "Mad Men" has even helped them in other aspects of their careers.

"A lot of people in this town also watch this show, directors and producers and everything. So for someone like me, I can't speak for everybody, but I go into rooms now with directors or whoever, and they're a lot more familiar with what I've done because everybody here watches," said Feldman.

In the show, Kartheiser depicts a sleazy Pete Campbell, who is a major player in the office. Last season he had an affair and got in a fist fight with a partner in his firm and this season might not be much better for the depressed and dark Campbell. However, Kartheiser believes that a lot of viewers identify with his character.

"Most people think they're Don Draper and most people are Pete Campbell, and he is kind of what has become the successful man in America," he said.

Kartheiser isn't giving much more away about what's to come this season, telling everyone to "watch on Sunday."

For Anthony Mason's full interview, watch the video in the player above.