There is one Liar who isn't about to let another generation grow up to be the Pretty Little Liars.

'Pretty Little Liars' Season 5: Keegan Allen Teases 'Mind-Blowing' 'A' Reveal

Caleb Rivers and Hanna Marin won't be feeling particularly jolly while helping at a children's Christmas event. Despite worrying that an ankle-biter took a leak on him and his elf costume, Caleb will be more than a little peeved at Alison's "Mini Me" (see video below)

Blonde, fashionable, and a tiny Queen of Mean, the little terror and her loyal band of followers will be picking on another child during "How the 'A' Stole Christmas." Hanna will step up and try to scare the rude out of the clique, but the momentary win won't combat the ongoing problems the real Alison is causing.

'Pretty Little Liars' Season 5: Ghostly Mona Revealed, New PHOTO From Christmas Episode

With Spencer facing down murder charges and 'A' set to make an unwelcome appearance at the Ice Ball, the Christmas episode is shaping up to be fairly dangerous.

"What happens in this episode sets us up for the remainder of the fifth season, so it's pretty crazy," said Lucy Hale (Aria), according to Clevver TV (via Wetpaint). "Although it is beautiful to look at, it's probably one of our darker episodes, though."

Find out more when Pretty Little Liars returns Dec. 9 at 8 p.m. ET on ABC Family.

Tags: pretty little liars television ABC Family