“Chuck, it’s okay. Trust me, I’ll never let anyone hurt you.”
– Sarah

Sarah means that from the bottom of her heart. She means that even more than Chuck could comprehend. And she’s true to her word, too. She makes good on that promise by killing a Fulcrum agent in cold blood.

If you haven’t already, make sure to read the disclaimer.

Let’s back up for a second. Let’s go back to the pilot episode, where Sarah defends herself against an onslaught of NSA agents intent on killing her. Sarah is not a kamikaze spy. She has a keen self-preservation instinct. How else does one stay alive in the spy world? (Spoiler alert: we’re going to come back to the idea of self-preservation later.) But Chuck has flipped her world upside-down. On a practical level, protecting an asset means putting the asset’s life above her own. But Sarah actually puts a higher value on Chuck’s life. It’s the kind of valuation that can only come out of love. In “Chuck Versus the Break-Up,” she jeopardized her life and risked compromising her cover to save Chuck from a Fulcrum agent. In “Chuck Versus Santa Claus,” after winning the fight with Mauser, she’s in a similar situation, but this time, it’s not her life that’s at stake; it’s her soul. Do you remember what we learned back in “Chuck Versus the Alma Mater?” The spy world corrupts. Sarah has been corrupted. How much does one more kill matter in the grand scheme of things?

However, the universe doesn’t come with a built-in ethical ledger. Good deeds aren’t debits, and bad deeds aren’t credits. Chuck certainly hasn’t been keeping track; he doesn’t think of Sarah as someone who’s in the red. It’s too bad that Chuck can’t see Sarah’s inner turmoil. It’s too bad that Sarah lies to Chuck. And it’s too bad that yet again, those two crazy kids can’t sort out their feelings. They could probably benefit from more of that therapy that Chuck mentioned in the previous episode. Hey, sign me up too. I’m the one who’s wasting time overanalyzing them.