Theme of The Vampire Diaries the return nightfall?

"The Vampire Diaries: The Return" and "Nightfall" are not official titles of episodes or arcs in The Vampire Diaries TV series. It's possible you're referring to fan-made content, or perhaps a specific scene or moment within the series.

To help me understand your question, please provide more context:

* What specific scene or episode are you referring to?

* Are you referring to fan-made content?

* What are your thoughts about the possible themes you see in this specific content?

Once I have more information, I can better understand your question and give you a more relevant response.