[s5e12] The Devil Inside — Newest

Katherine, surviving inside Elena’s mind, works with her daughter and a Traveler witch named Mia to make the possession permanent.

Instead of traveling the world with Nadia, Katherine decides to stay in Mystic Falls to win back Stefan Salvatore . The Breakup & Damon's Dark Turn [S5E12] The Devil Inside

In a rare moment of softness, Stefan comforts Caroline, telling her that while she made a mistake, she is not a "horrible person." Katherine, surviving inside Elena’s mind, works with her