This Sunday will host an all new episode of hit AMC original series "Mad Men," currently in its seventh and final season. The episode is entitled "Field Trip." Lucky for eager fans, AMC has released a promo revealing details about this Sunday's episode.

The promo reveals Peggy's growing frustrations as she fights for respect at the office. And it seems that things become complicated for Don. The promo shows him, also frustrated, struggling to get in touch with someone on the phone. While the promo doesn't say for sure, it is very possible he is trying to get in touch with Sylvia Rosen.

AMC has released an official synopsis, which remains vauge, but implies that Don, Betty and Harry will all have large roles in this week's episode.

"Don will take a trip, Betty will dine with a friend, Harry is going to be promoting a cause, and the partners will be considering an asset during 'Field Trip,'" the synopsis reads.

In other "Mad Men" spoiler news, Weiner also admitted that he could have ended the show with Don taking his children to see his childhood home, as it represents such character development for Don. But Weiner used that event in the last episode of season six. He has something else in mind for the end of "Mad Men."

"I do have a different idea for the end of the series, but I'll tell you, now that I'm at the bottom of the mountain looking up there, I have thought, 'Wow, you idiot! You could have walked away from there.' But it's an honor to have a challenge like this," he explained.

To watch the promo for "Field Trip," click here.

And to watch the full episode this Sunday evening, tune into AMC at 9/8c.