Scoop: ABC's Killer Women Targets Weeds Baddie Kate del Castillo, Mad Men's Mrs. Draper

Killer Women Kate del CastilloABC’s Killer Women doesn’t debut until Tuesday, Jan. 7, but already we’ve got casting scoop for its freshman finale.

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The eight-episode midseason drama stars Battlestar Galactica vet Tricia Helfer as Molly Parker, a Texas Ranger who is aided by her sixth sense for why women kill. BSG‘s Michael Trucco and Marta Milans costar as Molly’s brother and his wife, Jeffrey Nordling (24) plays her estranged hubby and Marc Blucas (Necessary Roughness) is the DEA agent she’s having an affair with.

In the season finale, TVLine has learned, Mexican superstar Kate del Castillo — whose previous TV credits include Weeds crime boss Pilar Zuzua — will guest-star as Esmeralda Montero, the leader of a drug cartel involved in the kidnapping of someone close to Molly.

Del Castillo’s Stateside credits also include episodes of Dallas, Grimm andMelinda_Page_Hamilton CSI: Miami.

In the same episode, Melinda Page Hamilton (Mad Men‘s Anna Draper, Devious Maids) will play Hillary Barnes, a DEA Agent who joins in pursuit of the kidnappers — but may harbor her own agenda.

Previously announced Killer Women guest stars include Leverage‘s Beth Riesgraf and Under the Dome‘s Aisha Hinds.

Killer Women will air Tuesdays at 10/9c, starting Jan. 7.