Ron Swanson is one of the manliest men to ever appear on television. His mustache alone has become the stuff of TV legend, which made his transformation on this week's 'Parks & Recreation' (Thu., 8:30PM ET on NBC) all the more tragic.

For the second time in series history, an ex-wife named Tammy has proven able to completely transform his behavior. Only this time, she completely emasculated him. First of all, Ron without a mustache is a frightening thing to behold, but then he passed on yelling about government spending?

'Parks and Recreation' returns Sept. 22, and to get you prepped for the new season, we've got an exclusive montage that serves as a refresher course on the relationship of Ben Wyatt (Adam Scott) and Leslie Knope (Amy Poehler).

Remember how they didn't really like each other way back when Ben first arrived in Pawnee? Well, that didn't last long, as the two government nerds found out they may of the same interests in common. Eventually they fell in love, and that was more adorable than a basket of puppies.

But as we saw at the end of last season, when Leslie was asked to run for office, she realized she'd have to make a decision about her relationship with Ben. Pawnee government employees aren't allowed to date each other, so she could keep seeing him in secret (and risk a scandal if the relationship became public) or break it off with him. I've seen the first two episodes of the show's new season, and I won't give anything away about what happens except to say that Leslie's dilemma occupies much of the season 4 premiere.

Tammy vs. Tammy in an "old-fashioned prairie drink-off?" Holy shot glasses, the new season of 'Parks and Recreation' can't arrive fast enough.

In the video below, we get our first glimpse of Patricia Clarkson as Tammy 1, Ron Swanson's first ex-wife, for whom the adjective "formidable" seems inadequate. We also see Paula Pell as the intimidating Tammy Zero, the mother of all Ron Swanson goodness (are we a little disappointed that Ron's mom, the O.G. Tammy, if you will, doesn't have her own awesome mustache? Discuss in comments).

In the four-minute behind-the-scenes clip, which features the 'Parks and Recreation' cast talking about what's to come when the show returns, the Tammys sit down for the aforementioned drinkoff, and unwisely, Leslie Knope (Amy Poehler) tries to keep up.