Once Upon a Time returns this Sunday with the Snow White-centric episode “The Queen is Dead.” Watch the first sneak peek here.

The clip features Downton Abbey‘s Lesley Nicol, who guest stars this week as Snow’s old maid Johanna. Snow finds her in Storybrooke, presumably after Johanna has sent her the tiara, which she found in Gold’s shop.

Johanna talks about the white flowers she’s planted, saying that, “They reminded me of you, because they could survive the harshest winter, and you were born during the harshest one of all.” And that, we learn here, was why Queen Eva named her Snow.

But the nice moment is broken when they hear a noise, and Snow goes into the woods to see Regina and Cora digging for the dagger – and conveniently overhears their entire master plan of using the dagger to force Rumpelstiltskin to kill them all…

Check out the promotional images released for this episode, that reveal David holding the dagger. It looks like he and Snow find it first!

Once Upon a Time 2×15 “The Queen is Dead” airs this Sunday at 8/7c on ABC.

What do you think about the season so far? Is it as good as season 1, or maybe even better? Share your thoughts in the comments.