The latest episode, Let Her Go, of The Vampire Diaries, had viewers say goodbye to Sheriff Liz Forbes (Marguerite MacIntyre), hello again to Bonnie (Kat Graham) and Lily Salvatore (Annie Wersching) made her entrance.

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Executive producer Julie Plec dished to The Hollywood Reporter Thursday about what will come of Lily's presence.

Let Her Go ended with Damon (Ian Somerhalder) reuniting with Bonnie and Bonnie revealing she came across a mysterious woman while in the prison world from 1903. 

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Damon identified the woman as his and Stefan's (Paul Wesley) mother, which Plec said would definitely bring about "insanity".

"Here's a woman they thought was long dead, having died a totally natural, human death. And there she is, what, 65 years," Plec explained of Lily being in the prison world.

Plec shared Lily was "either wrongly victimized, or entirely deserving of her incarceration."

Damon is going to struggle according to Plec about whether to tell his brother about what he now knows.

"Damon has to ask himself, what do I need to learn about this person before I tell my poor little brother that has mourned her since he was 10 that she might be an evil, evil person trapped in bad places," Plec revealed.

Plec shared there will be much more of the prison world to come especially since viewers will get to see how Lily ended up there.

"Hypothetically, I think it will not necessarily be what it expected from a long-lost mother they loved dearly," Plec shared in regard to the idea of Lily making it to present-day Mystic Falls.

Catch The Vampire Diaries on Thursdays on The CW at 8 p.m. ET.

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