Want some "Once Upon a Time" season 4 spoilers that isn't about "Frozen?" You got it!

According to TVLine spoilers. "Once Upon a Time" season 4 episode 4 is currently casting for the role of an "elderly, grizzled, unflappable" knight who has dedicated himself to the righteous cause.

Although this description is a little vague, fans are already theorizing that this character could related to the Holy Grail. Others also have other ideas.

"I'm actually getting more of Don Quixote vibe," commented violetvaper on TVLine.

"What about the White Knight from Alice in Wonderland?" asked Twilight.

Meanwhile, some of the "Once Upon a Time" season 4 cast members are still reminiscing about the dearly departed Sheriff/Huntsman, played by Jamie Dornan.

"Mr. Dornan's sexy!" said actor Josh Dallas to E! Online. "I can't wait to see the movie. I'll be the first one there."

Dornan is slated to appear as the seductive billionaire in "Fifty Shades of Grey."

"We're still good friends and obviously he has quite the schedule," said Jennifer Morrison.

"But we're hoping that someday there will be a moment where he's able to come back and reprise some flashbacks of Sheriff Graham."

In addition, spoilers confirm that in addition to Anna, Elsa, and Kristoff, Hans and the Troll King Pabbie will also join "Once Upon a Time" season 4. According to People, John Rhys-Davies ("Lord of the Rings") has been cast as Pabbie, while Tyler Jacob Moore ("Shameless") will play the devious Prince Hans from the Southern Isles.

"Lost" alum Elizabeth Mitchell has also been cast in a mysterious role, who will either be the original White Queen or Anna and Elsa's mother.