Rebecca Romijn proved she can kick major butt in the X-Men films and now, she’s bringing her lethal moves to Chuck‘s final season.

EW has learned exclusively that the actress will appear in the sixth episode of the upcoming season (which starts Oct. 21) as Robyn Cunnings, an elite Special Agent with the CIA who’s as cold and calculating as she is sexy, and is known for her barbaric (yet highly effective) interrogation techniques.

As expected, her appearance brings nothing but bad news for Chuck and Co. Her character is said to be a member of a rogue group within the CIA that is planning to frame Chuck for the crime of the century.

Romijn, who is currently appearing on the Adult Swim comedy series NTSF:SD:SUV, last graced network TV on ABC’s Eastwick and Ugly Betty.