Actors Ginnifer Goodwin And Josh Dallas, Right, From The TV series 'Once Upon A Time.'
Actors Ginnifer Goodwin and Josh Dallas (R) from the TV series "Once Upon A Time&" arrive at the 15th Annual Costume Designers Guild Awards in Beverly Hills February 19, 2013. Reuters

In "Once Upon A Time" Season 4, Episode 6, the Snow Queen (Elizabeth Mitchell) reveals a bit more of her history and intentions in Storybrooke. Secrets are revealed, and Belle (Emilie de Ravin) winds up on a cliff with Anna (Elizabeth Lail).

Spoiler alert: This update contains Once Upon A Time Season 4 spoilers. Read at your own risk if you have not seen the previous episodes or the new episode clip.

"Sister against sister," says the OUAT 4x6 promo clip. This could be about the "truth" that Anna may have chosen to hide from her sister: why their parents left Arendelle. Rumplestiltskin (Robert Carlyle) being the source of this information is enough reason to doubt that there is nothing more to the story.

The Dark One's dagger gets more screentime in the next new episode of Once Upon A Time Season 4. It's Belle vs Rumple/Mr Gold, and she is out to rescue Anna.

"Some secrets are better left buried," says the icy snow queen in the OUAT 4x6 promo clip. The "Frozen" arc on the ABC fantasy drama is halfway through, so viewers can expect more revelations from next week onward.

Here are some of the highlights of this week's OUAT episode:

- Emma (Jennifer Morrison) tells Regina (Lana Parrilla) she wants to be friends with her, because she is the only one who could understand her issues. And the former evil queen has done so much for her.

- The Knave of Hearts (Michael Socha) is somehow escapes the Storybrooke jail, and Snow White (Ginnifer Goodwin) inadvertently grants him pardon.

- The Snow Queen gives Sidney Glass (Giancarlo Esposito) his freedom, after the latter betrays Regina.

- Emma and Captain Hook (Colin O'Donoghue) discover that Sarah Fisher, aka the Snow Queen, was in her past as a foster care program staff.

- The Snow Queen wants to have a family that wants her, too.

VIDEO: Once Upon A Time Season 4, Episode 6 | ABC on YouTube

Once Upon A Time airs Sundays on ABC.

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