It was just a matter of making sure we had the character down.

We ultimately cast Britt, and its exactly the right fit for the show now.

Read our full interview with Robertson below.

BRITT ROBERTSON

Credit: Nicole Wilder/ABC

I dont know, I dont really think about that stuff anymore.

I just kind of hop from one project to the next, really.

So that part of it was really cool for me and super-exciting.

WESAM KEESH, JASMIN SAVOY BROWN, BRITT ROBERTSON

Im just trying to do what I do.

Youre not the bitchy one, or the good girl, or the love interest, or the worker.

It doesnt have to be one little box that you have to fill.

Tell us about Sandra as a character.

What drives her?Her big drive is with the human aspect of her job.

So I think she wears that.

And to do her due diligence.

Mostly, she just really cares for other people.

Shes deeply empathetic and feels like theres an injustice.

And if theres an injustice in the world, she wants to be there to serve that injustice.

The original pilot starred Britne Oldford in your role.

Just think about it the way you would want to embody this character.

And hes just a really competitive dude anyway.

Not really even competitive, but hes very driven as a person, so he gets really excited.

He was taking ownership of it, and he was like, Mines going to be the best episode.

But we all want whats best for the show.

So I think it lives underneath the surface because thats what the writing lends itself to.

And then I just went in, and they were all in the room.

I kept messing up, I got really sweaty, they had to powder me at one point.

Theyre being like, Yeah, thats a no-go.

Then they called me three hours later and they were like, Youre going to be in this show.

And I was like, Oh, sh, okay.

What was that feeling like when you found out?I didnt totally buy it.

I mean, I wasnt even that bad in terms of preparation.

So it was just tough.

If you stay tuned after you watch the pilot episode, it only gets better from there.

And they had already done a pilot and had to redo the pilot.

For the Peopledebuts Tuesday at 10 p.m.