Wow, Elena, you sure know your Roman history!
In the following sneak peek at The Vampire Diaries Season 5 Episode 14, Stefan is helping Elena study and is blown away by her knowledge of centuries-old trivia.
Little does he know, of course, that Elena is actually Katherine and there's a reason she's such an expert: She was alive for all of it!
Watch what unfolds this Thursday now:
The Vampire Diaries Season 5 finally returns in just two days after a lengthy, Olympics-related hiatus.
Look for Stefan to go searching for a captive Damon during the hour, watch The Vampire Diaries online if you need to catch up and check out photos from "No Exit" here: