The part where Nicole Richie is guest starring in detective comedy "Chuck" has been previewed through several new clips outed. Richie is starring as Heather Chandler, a high school bully who has a bitter past with Sarah and turns out related to the case Chuck is investigating.
Through the presence of Heather, Chuck learns more things about Sarah's past such as her insecurities as a teenager. Sarah, trying mightily to avoid Heather, has to encounter her once again when the mission brings them back to their high school. Heather's nerdy husband Mark (Ben Savage) turns out to be a key player in a new mission, and the agents have to stop the sale of potentially dangerous super-bomber plans. Yet, all the action ends with the ultimate cat fight.
Meanwhile, Big Mike leaves town for a day and Buy More's new assistant manager Lester decides to implement a new sales policy.
The episode called "Chuck Vs. The Cougars" will be aired on October 20 at 8/7c on NBC.