When "Once Upon A Time" returns on ABC with season 5 episode 2 at 8pm on Sunday, 4 October, it will focus on the struggles faced by major characters, including Emma aka Dark Swan (Jennifer Morrison) and Evil Queen Regina Mills (Lana Parrilla).

The official synopsis of "The Price", which will be live streamed here, read: "In an effort to protect Emma, Regina steps up in a surprising way that will test her mettle as a force for good."

The first episode of the fairytale series might reveal more details about Merlin aka Sorcerer, teased Elliot Knight. "He's very much tied to Camelot. A lot of the answers lie in Camelot. That doesn't mean that he's there, and I'm not saying that's not true. If they want to find out where Merlin is, the answers are in Camelot," he told The Hollywood Reporter.

The actor even teased that his character will play an important role in the new dark one's life. "We know that Merlin is super important to what's going to unfold in terms of events for Emma, who obviously has an impact on everyone. He's definitely going to have an impact on everyone and everything," he said.

Meanwhile, the description of the premiere episode stated that King Arthur (Liam Garrigan) and Queen Guinevere (Joana Metrass) will throw a royal ball to welcome the heroes to Camelot, but when the celebration takes a deadly turn, David and Robin must leap into action or lose a crucial asset in the fight to save Emma.

In Storybrooke, Captain Hook (Colin O'Donoghue) will deploy a tried-and-true technique in hopes of bringing Emma back to the light while the heroes discover that some unexpected baggage has followed them home from Camelot.

ABC will air "Once Upon A Time" season 5 episode 2, titled "The Price", at 8pm on Sunday, 4 October.