09/01/2011 02:47 pm ET Updated Nov 01, 2011

'Parks And Recreation' Season Four Promo: Meet The Tammys (VIDEO)

Fans of "Parks and Recreation" have long delighted in the antics of Ron Swanson's ex-wife Tammy, the fiery temptress of a librarian who traps Ron with her sex appeal and nefarious intent. But, until the end of the show's third season, it had gone only briefly mentioned that Ron had both another ex-wife named Tammy and a mother who also bears that name.

After a summer filled with casting and speculation, it's time to meet the other two Tammys.

Playing his first ex-wife Tammy -- or, Tammy One -- is Patricia Clarkson, whom Swanson actor Nick Offerman calls the antithesis of the horny witch that is Swanson's other ex-wife.

"Tammy One and Tammy Two could not be anymore different," he says. "Tammy Two, played by my wife Megan [Mullally], is a raging hellcat who uses her sexual wiles to control Ron."

"Tammy One is ice cold, dangerous, steely and maternal," Amy Poehler, the show's lead as Leslie Knope, says. "Tammy One is played by Patricia Clarkson. She comes in and pushes Ron away in a way we haven't seen before. Ron gets neutered and turned into basically an infant."

Then there's the matter of Ron's mom, or Tammy Zero. Check out the video below to find out more about her, as well as other story lines from the upcoming season.

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