PRETTY LITTLE LIARS
Freeform, 8:00 p.m. ET
SERIES FINALE: For seven years now, this series has teased viewers about the identity of the mysterious troublemaker known as “A,” whose antics have bedeviled the gossipy clique of friends in a small Pennsylvania town. Tonight, in the finale, the identity of “A” will be revealed. So if you care, you should watch.