Credit: Frederick M. Brown/Getty Images Photo: Katheryn Winnick at the Los Angeles Premiere of Love and Other Drugs on November 4, 2010

Katheryn Winnick, who played Booth's (David Boreanaz) girlfriend Hannah in Bones Season 6 (cue the boos!), is taking her kick-ass tae kwon do skills to The CW for Nikita's sophomore season. Katheryn, who holds a third-degree black belt in real life, will play Kelly, the partner Nikita (Maggie Q) abandoned when she ditched Division. According to E! Online, she'll make her first appearance in Episode 4, reuniting with her one-time parter in espionage. What happened to Kelly after Nikita went on the run — and why are they teaming up again after all these years? We have to assume Kelly is more than a little bitter...

Don't miss the Nikita Season 2 premiere on Friday, September 23 at 8/7c on The CW.

Source: E! Online