As this week’s episode of "Once Upon a Time" opens, Prince James (Josh Dallas) is having family trouble after deciding to bail on his marriage to Abigail (Anastasia Griffith). She tells him, though, that she doesn’t want to marry him either.

It turns out that Abigail has a tragic love story of her own. Her beloved Frederick touched King Midas while defending him from an attack and was turned to gold. She hasn’t been able to use True Love’s Kiss to restore him because of the shell of gold.

James offers to go to a magical lake and bring back some water that may ‘restore what was lost’. The lake is guarded by a Siren who seduces James by appearing as Snow White. She tries to drown him, but he kills her instead.

The magic water frees Frederick and he is reunited with Abigail. James finds out Snow White really loves him, but ends up being hunted by the king.

In Storybrooke, David is also having family trouble in his faux marriage to Kathryn, who wants to move to Boston to start their life over.

Although David continues to waffle about telling Kathryn the truth about his relationship with Mary Margaret (Ginnifer Goodwin), she convinces him to tell Kathryn they they're in love. He calls it off with Kathryn, but fails to come clean about the affair.

The Stranger (Eion Bailey), whose name is August Booth, flirts with Emma again. Secretly, however, he’s taken Henry’s fairytale book apart and is doing something mysterious to it. Emma agrees to a date, and he takes her to a “magical” wishing well. The next day, she discovers Henry’s book in the gutter and returns it to him.

Regina tells Kathryn that David and Mary Margaret are involved. Devastated, Kathryn confronts Mary Margaret (at school!), who becomes the town pariah for having an affair. She tells David that their relationship is self-destructive and ends it.

Kathryn, determined to go to Boston and seek a new life, leaves Storybrooke. But her car crashes just before passing the city limits, and she disappears.

WHAT WORKED
This episode left some tantalizing questions. What happened to Kathryn? What was the Stranger doing to the book? Does Regina have keys to everyone’s house, and what is she doing with them? Will Kathryn and Frederick ever find each other? And will Mary Margaret lose another button on her sweater? It also redeemed the previously-unloved Abigail/Kathryn.

WHAT DIDN'T WORK
King George needs to hire better soldiers. A big deal was made about destroying Kathryn’s letter, but would it really have mattered either way? It seems unlikely that Kathryn, even this angry, wouldn’t have recognized how inappropriate it was to make the affair public in an elementary school. And, ‘August Booth’? Really?

GIVING CREDIT WHERE CREDIT IS DUE
‘What Happened to Frederick’ was written by David H. Goodman. It was directed by Dean White. "Once Upon a Time" airs Sundays at 8 p.m. ET on ABC.