Good Behavior clip: Michelle Dockery rocks a wig and Southern accent

Michelle Dockery has a confession to make — and a con to pull off.

As Letty Raines in TNT’s upcoming Good Behavior, the actress and former Lady Mary on Downton Abbey plays a woman recently freed from jail who falls back into her old ways when she overhears a hit man’s plot to take out a client’s wife. In the exclusive clip above, she uses her old tricks (including that blunt blond wig and a thick Southern accent) to catch the eye of the hit man himself, named Javier (Juan Diego Botto), at a bar.

“You’ll think I’m awful,” she says, right before spinning a story of a blind date she’s afraid to embark on. “I know, I’m a terrible person.” He appears to buy it, asking her to dinner — but at what cost?

Watch the clip above. Good Behavior premieres Nov. 15 at 9 p.m. ET on TNT.