Caroline Forbes admits to "Elena" (Katherine) that she slept with Klaus .
In a rare moment of softness, Stefan comforts Caroline, telling her that while she made a mistake, she is not a "horrible person."
Elena briefly regains control and tries to flee, but the Travelers complete the spell just as she reaches Damon.
Believing he is speaking to Elena, tries to reconcile, admitting he needs her "goodness" to stay in the light.