Warning: This article contains spoilers about Thursday’s episode ofGrey’s Anatomy.

It all started when she met Richard’s brother, Chris, and his niece, Sabrina.

Only, she wasn’t able to save the day, and Richard lost his niece.

GREY’S ANATOMY

Credit: Kelsey McNeal/ABC

EW spoke with Kelly and Crystal about their experience filming the emotional hour.

ENTERTAINMENT WEEKLY: Was this your first time acting together?

CRYSTAL MCCREARY:Ever!

KELLY MCCREARY:It was our first time acting together ever.

[Laughs] We never had a chance to actually do anything together.

We were trying to audition and keep roofs over our heads.

I will never forget that, we were like, “This could be it!”

But this is the first time it actually happened.

Divide and conquer!"

[Laughs]

CRYSTAL:Yes, I remember that!

KELLY:But we never had a chance to until now.

So how did acting together onGrey’scome about?

[Laughs]

If you’d never acted together before, was the experience what you expected?

CRYSTAL:It was better.

It was way better than I expected.

It’s really awesome!

you might’t imagine that work can be as much fun as that until it’s actually happening.

Crystal, did you know your character was going to die?

But it was before I got to the end and then I literally was crying at the end.

I got to help with that!

So it was really sad but it was also really triumphant.

Kelly, what was it like for you to filmthe scene where your sister’s character dies?

Did it affect you differently than other scenes?

I’m pretty good at playing pretend, so I was like, “She’s playing Sabrina!”

She wasn’t even in the room and I think that’s what it was.

CRYSTAL:I actually heard about it.

Ending things on a lighter note, what was your favorite scene together from the episode?

KELLY:It was the one where we were waiting in the hallway.

CRYSTAL:Mine too!

It was so cute.

CRYSTAL:And really fresh and honest.

I felt like it was so us, so natural.

That was a great scene, that was really special.

Grey’s Anatomyairs Thursdays at 8 p.m.