WhyDoctor Whostar Jodie Whittaker was 'so sad' filming holiday special

The holiday episode airs Jan. 1 on BBC America.

This article contains spoilers for the upcomingDoctor Whofestive episode.

“I dont have a poker face.

Its my actual job, so I should be better at it.

But I remember when they called wrap on that day, Tosin was like, ‘Calm Down!’

Id gone, Id absolutely gone.

In a way, its just reflective of the time weve had and this journey.

I’m really lucky.

This job is this thing that is untouchable.

Therell be a million other amazing experiences, hopefully.

I felt very much like a kid in a well.

I was so sad.”

However, they soon discover a disturbing plan forming.

A plan which involves a Dalek.

TheDoctor Whofestive special airs Jan. 1 on BBC America.

Watch the trailer for episode above.