Chuck

The Chuck guest-starring carousal continues to spin.

Over the last two week, Brandon Routh and Kristin Kreuk were announced as recurring characters on the NBC series.

Now, Entertainment Weekly reports that former Law & Order star Angie Harmon has signed on to guest star in this season’s fourth episode. She'll appear as Sydney, a spy for the Ring that wants to do away with Ryan McPartlin’s awe-obsessed alter ego.

Very sadly, Chuck won't return to NBC until March 2010.