Spoiler alert: This post contains plot from the season 1 finale ofPretty Little Liars: The Perfectionists.

It seems the person who killed Nolan and who is spearheading the experiment goes by The Professor.

EW spoke with showrunner I. Marlene King about the finale twists and a potential season 2.

ENTERTAINMENT WEEKLY: If the show gets a second season, were heading into phase 2 of the experiment.

What would that mean in terms of how season 2 might differ from season 1?I.

The next part of the experiment is going to be much more interactive.

Will the mystery of who is The Professor last all season?

But it is living in the world of the professor.

And the person is the professor of this experiment for sure.

I loved Monas reaction to the whats your biggest fear question.

She is ready to fight back.Shes doing it for love.

She has to find her balance.

Because shes sort of aware now of the fact that that happens to her.

She has some awareness of it.

Its been so much fun to keep those characters alive and give our audience information about them.

Its the most joyful part of my job.

Im hoping we get to keep doing it.

Its like Im sitting in my oldPLLoffice crafting a scene.

Nobody likes them more than I do.

Alison was looking at that Emily photo rather longingly…Oh, I think so!

The original PLLs have been so supportive of this show, not just the ladies but the men.

Because they can come and visit our world and it will still feel like our world.

Because it is the same universe.

And hopefully, well get more into Alison and all of their personal journeys.

Theres still so much more to learn about them.

And more about Nolan too!

I loved that Luke-Dylan moment.

So yes hes going to stick around.

What was your favorite episode of season 1?The pilot is beautiful.

Pilots are always special to me because youre birthing the show.

But I love this finale too.