'Pretty Little Liars' sneak peek: Duncan saw Alison the weekend she died

There are only two episodes left until A is finally "unmAsked" on "Pretty Little Liars." Check out these two sneak peek video clips from next week's episode, titled "Eye of the Beholder."

In the first one, Aria is talking to Vivian's mysterious friend - his name is Duncan, in case you were wondering and he seems to know a lot about the Liars. He apparently met Alison in Brookhaven, but where, exactly? He's being quite mum about it. But he does say he say Ali the weekend she disappeared!

And look who's back in town! Toby has come back to Rosewood and is none too friendly with Spencer, who is so nervous it just breaks our hearts. Jenna is recovering from her first surgery (they do one eye at a time). Does this mean she'll wear an eye patch? That'd be cool. Pirate Jenna. But we are not liking Toby suddenly being all buddy-buddy with her and neither is Spencer.

"Pretty LIttle Liars" airs Monday night at 8 p.m. ET/PT on ABC Family.