An even more shocking kiss.

The latest installment ofOrphan Blackwas filled with crazy surprises.

It also marked the triumphant return of Krystal the clone.

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Credit: Ken Woroner/BBC America

ENTERTAINMENT WEKELY: Krystal the clone has returned!

How much fun is it to bring her back?

JOHN FAWCETT:She makes a great entrance here in this episode.

She looks fabulous and is fun to dress and style, thats for sure.

By the way, where did eyelid teeth come from?

GRAEME MANSON: It was actually in a shopping market magazine, like a tabloid.

She gets the results and tells Felix that they are actually siblings.

MANSON:Well, I guess you never know on this show.

I cant give that away.

I like to believe it in this moment, for sure.

FAWCETT:And this was kind of our what we wanted to do.

We talked a lot about this doing our version of the family dinner inAugust: Osage County.

Its emotional and she feels horrible about it.

And then, on top of that, food has been thrown.

These are also contemporary family issues.

Its going to happen more and more.

It actually really surprised me the level that you guys took it.

Thats just really pissed off.

FAWCETT:Incidentally, we wrote that scene to end in a food fight.

So Felix is going to throw the food at Sarah.

Sarahs going to throw the food.

How much food are we throwing?

And then exactly what are we throwing?

And then it was sort of like, maybe Sarah doesnt need to throw back at Felix.

And we ended with one bit of food.

MANSON:At the end of the day we had to give up ourAnimal House.

FAWCETT:We just wantedAnimal House.

MANSON:I did!

We wanted something much bigger.

Who was going to be the zit?

Who was going to be the Belushi zit?

MANSON:That would have been Kira.

Lets get into the opposite end of this, and some really serious stuff here where Cosima infiltrates Brightborn.

She ends up in a delivery room and sees the birth of one of these genetically modified babies.

We see a baby born with almost a concave face and no nose.

FAWCETT:We had done a ton of research on certain genetic abnormalities in children.

This was based in complete science.

It wasnt just something we fictionalized and faked, which makes it that much more disturbing.

We knew we had to essentially design a prop that reflected this genetic abnormality.

I cant remember the name of the condition right at the moment.

It feels like youre in there with them, and then this shocking result.

It really, really, rocks Cosima going forward from there.

Its not just body horror.

This is the kind of territory that were interested in treading.

Emotional horror, too.

So, Graeme, lets stick with Cosima and this conversation she has right after with Susan.

Susans trying to convince her to hand over Kendall.

Cosima says she doesnt want them to make more lab rats.

Is that pitch going to stick?

MANSON:Its a two-headed question going forward.

Its part of the fun, I guess.

And then we have the final image of Susan and Ira the clone in the pool sucking face.

A little bit of an age gap there.

Plus, this is creator and creation getting it on, which makes it a bit creepy.

Whats the story here?

FAWCETT:Obviously the relationship between Susan and Ira is more complex than we originally thought.

FAWCETT:The first glance at that is yes, a bit creepy.

It was practically to tongue kissing.

But it offers a lot of very complicated, dramatic possibilities going forward.

So this is kind of the way we like to roll around our offices and on the show.

I feel like we need to give Susan and Ira a couple name.

What do we call them: Sura?

MANSON:[Laughs]I hadnt even thought of that.

You guys have thrown a bunch of different balls up into the air with this episode.

What can you tease about whats coming up next week onOrphan Black?

FAWCETT:Yeah, I mean right now thats kind of it.

We have a three-episode arc coming up that began with episode five.

The five, six, seven roller coaster is a giant one for us this season.

Whatdoesnthappen next episode is more the question.

MANSON:Everybody brought it.

Tats just magnificent through this three-episode stretch.

The tonal shifts that Tat pulls off during this little run here is amazing.