The beginning of "Chuck Versus the Cliffhanger" when Sarah is rushed to hospital after being poisoned by Vivian:
Sarah: (delirious) Chuck?
Chuck: Hey. Hey, baby, hey, I'm right here.
Sarah: You look worried.
Chuck: No, you know, just... it's just wedding stuff.
Chuck: Sarah... Baby, I'm going to fix this. We're going to get married and be together. Forever. I love you.