Dwarf: You are the worst, most nasty, horrible...
Grumpy: Enough! Look what you're doing to Happy.
Recapper: Ahahahaha. Dear Show, these first four minutes just made my day. Humor works so well in the Enchanted Forest. Thank you.
Anyhow, Grumpy blames the potion for the change. Snow says the potion was the solution, rather than the problem. She rants about how she's in a cottage with dwarfs, instead of living in her castle as a princess. She rants about Regina having Leopold killed. Jiminy interrupts to point out that while her anger at Regina is justified, she's taking it out on everyone who loves her. Snow decides he's right and that she'll take it out on Queenie instead. When Jiminy starts to caution her that revenge will change Snow into something darker than she can imagine, Snow covers him up with a glass dome. She grabs a pickaxe off the wall and heads out to kill the Queen. Commercial.
In Storybrooke, Emma leads Mary Margaret into the room for questioning. Regina is there, supposedly to be an impartial witness. Emma acts as if this is perfectly fine with her, and tells Mary it can only be to her own benefit. During the interrogation, Mary admits that during the course of their affair, Mary and David would meet at the old t(r)oll bridge. Next, Emma takes out the jewelry box that contained the heart. Mary identifies the box as her own, and says it must have been stolen; she insists she's innocent. Regina takes Mary's hand and gets all transfer-y as she blathers in hushed tones that she knows what it's like to lose a loved one and be publicly humiliated.
Regina: It took me to a very dark place -- changed me. I can only imagine what losing David Nolan did to you.
Mary: I haven't changed. I'm still the same person I've always been. A good person. I did not do this.
Audience: Okay, we buy you didn't murder Kathryn, but good? Are you having blackouts that wiped out your ADULTEROUS AFFAIR?
Alone, in the hallway with Regina, Emma reminds her that Regina is supposed to be an observer. Emma will ask the questions. Regina asks how Emma knows Mary is innocent, and points out that since Emma is the sheriff and lives with Mary, that she probably would have seen signs of a break-in, if someone did, in fact, steal the box.
Regina: She is a woman who's had her heart broken and that -- that can make you do unspeakable things.
Recapper: Hey, over-indulging with wine, or ice cream might be pathetic, but surely not unspeakable!