'Pretty Little Liars' Season 5 Finale: "A" Revealed, New Threat Emerges

Things were not easy for the Liars, even as they made a shocking discovery.
ABC Family/Eric McCandless
A scene from Tuesday's 'Pretty Little Liars' season-five finale

[Warning: This story contains spoilers from the season-five finale of ABC Family's Pretty Little Liars.]

Pretty Little Liars delivered plenty of jolts in its season five finale — and even some electricity. 

Last week, Alison (Sasha Pieterse) was found guilty of first-degree murder in Mona's (Janel Parrish) death, with Emily (Shay Mitchell), Aria (Lucy Hale) and Spencer (Troian Bellisario) all getting hauled off to the slammer to join Hanna (Ashley Benson). 

The finale began with the Liars on their way to jail when the police van was hijacked. The next thing the girls knew, they were waking up in a giant doll house with replicas of their bedrooms. "A" really needs to get over this unhealthy fixation on dolls.

Read more 'Pretty Little Liars' Boss on Season 5 Finale's "Disturbing" Reveal: "It Really Is a Game-Changer"

They see someone playing piano with blonde hair and a mask, and it turns out to be — gasp! — Mona, who's stunningly still alive. However, Mona is convinced that her name is Ali, and she's even wearing Ali's yellow top. 

Mona tells the girls to play Mystery Dream Date to pick their prom dates, which no one is happy about. But during a sudden power outage, Mona gathers the girls to let them know she really is Mona, and that she has just been playing along so "A" won't hurt her. 

The girls stay in the dollhouse, where Spencer has a vision of the name "Charles" spelled out in blocks. Meanwhile, Mona receives a gas mask and a note saying she is A's favorite.

The Liars are forced to plan their prom, including outdated music and couple arrangements, until Spencer manages to figure out how to rig the electronics so they can fix the power. Thank goodness for Spencer. 

See more Broadcast TV's Returning Shows 2015-16

On the outside world, Toby (Keegan Allen), Ezra (Ian Harding) and Caleb (Tyler Blackburn) team up to track the van before telling Spencer's parents that "A" is back. They end up at the Campbell farm — which seems connected to Andrew Campbell (Brandon Jones) — and the police helps them find "A's" lair, which creepily contains footage of the girls in their dollhouse. 

Back in the dollhouse, Spencer is watching a projector playing home-video footage of twin boys with Ali's mom when a man in a masquerade mask walks up behind her. Mona enters the room to say that "A" has a soul, and suddenly the guy is gone. Nice timing, Mona!

The five gals think they've escaped through the yard but realize they're surrounded by an electric fence. What is this, Jurassic Park? Sadly, Charles' face is never revealed, although the #CharlesIsA hashtag confirm that the mystery dude is in fact the nefarious villain. 

So is "Charles" in fact Jason's (Drew Van Acker) twin brother? Is "Charles" now going by another name, meaning he's Lucas (Brendan Robinson), Wren (Julian Morris) or Andrew? What do you think of Mona still living and breathing? And are you hoping to never see that yellow top again? Let us know in the comments!

Email: Ryan.Gajewski@thr.com
Twitter: @_RyanGajewski