Pretty Little Liars
ABC Family, 8:00 p.m. ET
SEASON FINALE: Maybe this doesn’t rank any higher on the seismic TV scale than, say, learning the identity of Gossip Girl – but maybe it doesn’t rank any lower, either. On tonight’s second-season finale, set as a costume party, the identity of the scheming, hidden-in-the-shadows “A” is finally, maybe even literally, unmasked.