After reconnecting with Kate, Walden becomes convinced she is the one for him, until he meets a woman named Vivian.
The girls try to clear Spencer's name as Christmas approaches in Rosewood; a ghostly presence shows Alison a glimpse of the past, present and future.
Charlie's announcement that he is coming home for his birthday creates a difference of opinion among the Liars and members of the DiLaurentis family; Mona shuts out Mike; Hanna receives an unwanted surprise.
The Glee Club members audition for parts in the Nativity scene, Meanwhile, Rachel, Kurt and Santana work as elves at a mall.
Ken helps Dave ask a girl to the Valentine's Day dance, but his date is the daughter of a lawyer Ken doesn't get along with.