Check it out! Nicole Richie guest stars on Chuck Mon., Oct. 20. I’ve seen the episode and not only is Richie surprisingly good, but it’s the best Chuck ep so far this season.

Richie plays Sarah’s (Yvonne Strahovski) high school nemesis, but after a seemingly coincidental meeting at the Buy More, Chuck’s (Zachary Levi) flashes reveal that Richie’s character Heather Chandler (a Heathers reference, for sure) and her husband (Ben Savage) may be entangled in some major industrial espionage. Therefore, Sarah has every reason to kick Heather’s ass.

Want to see Yvonne and Nicole throw down? Check out the five additional clips inside!

“Chuck vs. the Cougars” premieres Oct. 20 on NBC at 8 p.m.