A relative of Maya. New rules regarding Mona. An angry Jason DiLaurentis and a major blowup between Hanna and Caleb.

All these developments and a great deal more will be featured on the upcoming Pretty Little Liars episode, "Birds of a Feather." In the first of our sneak peeks from it, watch Sterling Sulieman (Vampire Diaries) be introduced as Maya's cousin:

Next, watch Spencer try to talk some sense into Jason:

Does it work? Not exactly. Alison's brother shows off his temper in this clip:

Hanna is then in for a surprise when she goes to visit Mona:

She's also in for a big fight with her boyfriend, as depicted here:

Matt Richenthal is the Editor in Chief of TV Fanatic. Follow him on Twitter and on Google+.