"Once Upon a Time" season 4, episode 6 spoilers reveal that the relationship between Belle and Rumple will get tested, as Queen Elsa's reunion with Anna is not as smooth sailing as both of them would have liked.

In TVLine's "Once Upon a Time" season 4, episode 6 spoilers, Belle needs to find the Snow Queen but she's not going there alone.

"Rather, she wants her powerful husband to come with - but will she go so far as to compel ... the Dark One to do her bidding?" it said, adding that she will trick him using a bogus dagger.

The sneak peek released by ABC shows Rumple asking Belle where she's heading.

"To the Northwoods where the Snow Queen is hiding," she says.

"And what business do you have with her?" he asks her.

"I have to fix the mistake I made a long time ago," she explains, adding that she's hoping Rumple will accompany her on the quest.

But Rumple is not having none of it as he says that the Snow Queen defeated Regina and Emma and it's very dangerous for Belle to confront her, and it's out of the question for him to be there. That's when Belle pulls out the dagger from her bag to the surprise of Rumple.

"Belle, I gave you that dagger because I trusted you. Because you never want to control me," he says.

However, Belle's mind is already set and she's forcing Rumple to come along with her. What will these mean for their marriage?

Meanwhile, another promo clip revealed "Once Upon a Time" season 4, episode 6 spoilers as it shows the happy reunion between Elsa and Anna quickly turns awkward.

Anna went into a quest to find what happened to their parents in the Enchanted Forest, and before she can explain all to Elsa, she notices that her sister seems to be very calm.

"Wait, no flurries, no frost in the windows?" she says. "Usually, a conversation about our parents ends with a chill in the air."

Elsa then goes to explain that she's been learning to control her powers when she gets upset.

"Really, how?" Anna asks.

That's when the Snow Queen appears to say, "By training with me..."