The Bad Seed Pretty Little Liars Show

The Bad Seed: Pretty Little Liars puts on a show

It's school play time in Rosewood!

"Pretty Little Liars" is putting a show -- a school play to be exact and they are adapting the classic novel "The Bad Seed" for the high school auditorium stage in Monday, Feb. 21's episode, "The Bad Seed."

"The Bad Seed," written in 1954 by William March, is about eight-year-old Rhoda, who is an only child. Her mother, Christine, believes she may just have a bad seed on her hands when one of Rhoda's classmates mysteriously drowns and discovers her daughter did it.

In a preview clip for the episode, we learn Ezra (Ian Harding) is the teacher in charge of the school play and that Spencer (Troian Bellisario) is taking it extremely seriously. We're assuming she relates to the whole penmanship award drama that's in the novel. Remember the time she stole one of her sister's, Melissa, essays?

In another clip, the show brings on the creepiness with Spencer discovering a crying baby in her house in the middle of the night. We repeat: Creepy. Who's baby is that? Why is in her house? And who grabs Spencer at the end?

Watch "The Bad Seed" on Monday, Feb. 21 at 8 p.m. ET on ABC Family.