Next week: Casey and Sarah spar, and he wonders what's up with her. Oh, and Steve Austin and Nicole Richie are back to fight with our wonder couple once more. Oh, and it looks like Chuck proposes, but then he looks shocked by it, so it might be a red herring.

Watch the episode below, then discuss it in our forums. Then see some of our favorite Chuck guest-stars!

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DeAnn, a writer and editor in Portland, Oregon, doesn't think Chuck and Sarah need an Achilles heel to keep this show interesting. You can contact her at twopmodmars@gmail.com.