It’s not that Doctor Who’s festive episodes can’t be memorable; “The Husbands of River Song,” “A Christmas Carol,” “The Runaway Bride,” and more beg to differ. But I know it’s a holiday tradition in the U.

Filming that scene in the room that’s from millions of years ago was Coughlan’s favorite, she tells TV Insider. “It had a little bit of everything. You got that emotional moment and then you have the dinosaur and the escape, and I loved all of that,” she shares. “It’s such a fond memory.”

Warning! The following contains SPOILERS for the Doctor Who Christmas Special "Joy To The World." Stream it with a Disney+ subscription and read at your own risk!