'Once Upon A Time' Season 4, Episode 6 entitled "Family Business" witnesses the arrival of the Snow Queen Elsa (Elizabeth Mitchell) and her questionable intentions in Storybrooke. Also, as secrets are revealed, Belle (Emilie de Ravin) finds herself on a cliff with Anna (Elizabeth Lail).

The official synopsis of Episode 6 of 'Once Upon A Time' reads, "The race is on to track down the elusive Snow Queen, who was once a foster mother to a young Emma - whose memories of this event have been erased - in order to discover what her ultimate end game is for Elsa and the residents of Storybrooke."

Beyond that, Belle will travel back in time to Arendelle, and with the help of Anna, finds the Grand Pabbie to bring back her memories to know about her mother, as the two get in trouble as Anna slips from a cliff.

Fans should note that it's Emma that's not aware that she holds the real dagger that controls The Dark One.

Meanwhile, Hollywood Reporter got hold of an exclusive clip from the series showcasing the two sisters finally reunited.

"I was worried I would never see you again!," Elsa tells her younger sister.

"I'm sorry I left without telling you," Anna explains as the two embrace.

When Elsa inquires about whether Anna discovered anything about their parents' trip to the Enchanted Forest, Anna keeps silent and seems to shies away from revealing the truth.

"I'm still waiting for answers from a few people I met, it could take a long while," Anna said.

However, Anna notices something's strange about her older sister. Apparently, her older sister has not been acting herself, Anna says, "Wait, no flurries? No frost on the windows? Usually a conversation about our parents ends with a chill in the air."

After that, Anna discovers that Elsa actually learned to control her ice powers-with the help of the Snow Queen.

'Once Upon A Time' airs on Sunday, November 2, at 8 pm on ABC Network.