This is easily one of the best episodes of Chuck to date. I love how they always have a theme that they apply to all of the characters/relationships in the show. In this episode we see Chuck and Morgan's trust relationship juxtaposed with Lester/Jeff and Ellie/Awesome.
Casey's character shows some more depth. They continue to develop the deeper relationship between Chuck and Sarah. Chuck saves the day again with some quick thinking. Morgan grows up a bit. This show stays so fresh and so fun. Great acting, great suspense, great action. Chuck is one of my favorite shows on TV.