WARNING: The following contains spoilers for Season 3, Episode 9 of NBC's Good Girls, "Incentive."

NBC's Good Girls has had its female crime syndicate -- Beth (Christina Hendricks), her sister Annie (Mae Whitman) and their friend Ruby (Retta) -- time and time again overcome their enemies. It's what led to Rio (Manny Montana) recently taking Boomer (David Hornsby) prisoner, possibly as insurance, but also maybe to unite against the women, given they both have dirt on them.

The ladies simply keep finding ways to weasel out arduous situations. However, that looks to have changed in Season 3, Episode 9, "Incentive," because as much as a mastermind as Rio has been, there's a new villain on the block who's smarter and way more ruthless.

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This comes in the form of FBI agent Phoebe Donnegan (Lauren Lapkus), introduced in the previous episode as someone at the very end who spots the use of nail polish in counterfeit cash. "Incentive" begins with a montage of her juxtaposed against Beth, to show just how different they are. Beth's the picket-fence wife, well-kept and pristine in everything she does -- even crime -- while Phoebe is unkempt, sloppy and the total opposite.

In fact, interviews have revealed Phoebe was a beta in high school and seeing as Beth was an alpha, there will be hints of jealousy and a personal vendetta as Beth represents everything wrong with the world from Phoebe's perspective. She's the high school beauty queen getting away with crime and Lapkus herself has said Phoebe will be emotional in the war to come.

So far, Phoebe is more about using her head than her heart, which is a mistake Rio has made -- whether it's killing people close to Beth or repeatedly trying to intimidate her using other threatening means. Phoebe believes in smart planning under the radar and it's why she uses her fellow agent Henry (Rodney To) to actually have a weekend fling with a married FBI supervisor. This allows Phoebe emergency, weekend access to have the particular color of nail polish used by the counterfeiters recalled all over Michigan. She uses sex to take away Beth's raw materials and doesn't even have to leave home.

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Phoebe then starts tracking online sales and monitors who's seeking out the polish in stores. She basically lays a trap, not caring who she manipulates. Henry's amazed to see how dogged her pursuit is and she lets him know this is the mentality they must have to catch smart criminals. His colleague reminds him it wasn't the soldiers who went out and took down Osama Bin Laden in the cave who should have gotten the props -- it's those who slaved tirelessly for years on computers who found him. She has had a chip on her shoulder all her life, watching the "little people" get walked over or stepped on, so she's out to change this and make her mark.

Phoebe's way different from deceased agent Jimmy Turner, who admittedly did a great job of cornering Beth until Rio's thugs killed him. She doesn't care about alliances; she's simply out to take everyone down and build a reputation. Her plan forces the women into a shoplifting scheme to get the nail polish from one store and with access to that footage, Phoebe is poised to finally see who the culprits are. Once she wages all-out war, she'll be pitting herself against Rio as well, which will require her to step her game up to a whole new level.

Good Girls stars Christina Hendricks, Mae Whitman, Retta, Matthew Lillard, Reno Wilson and Manny Montana. Season 3 airs Sundays at 10 p.m. ET/PT on NBC.

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