Chuck Season 4 Episode 9 (Chuck s04e09) with title “Chuck Versus Phase Three” aired on Monday, November 22st 2010 at 08:00 pm via NBC Network.
Here is summary for Chuck Season 4 Episode 9 :

In order to escape The Belgian, Sarah, Chuck, Morgan and Casey immerse themselves in the jungles of Southeast Asia. The Belgian's mission is to discover more about the Intersect. Meanwhile, Ellie and Awesome dive into the secret Steven Bartowski left behind.