Prepare yourselves, Pretty Little Liars.

Hurricane Alison is about to blow into town.

At a recent event to celebrate the 100th episode of this ABC Family smash, we caught up with actress Sasha Pieterse, whose full-time return on Pretty Little Liars Season 5 will be the early focus of upcoming summer episodes.

What can fans expect from the "natural disaster" of Alison? What will her relationship be like with Hanna? With Emily? And is she truly a villain? Or just misunderstood?

Answers will begin to trickle in on Pretty Little Liars Season 5 Episode 1, which airs June 10.

Elsewhere in the same video, Tammin Sursok teases the return of Jenna. We can only imagine the kind of havoc that character will wreak in Rosewood...

Need to catch up prior to next week's premiere?

You can always watch Pretty Little Liars online.

Jim Halterman is the West Coast Editor of TV Fanatic and the owner of JimHalterman.com. Follow him on Twitter.