Credit: Janel Parrish Instagram

Pretty Little Liars is bringing back many of our old favorites in Season 5, including nice-guy-turned-mysterious-guy Lucas (Brendan Robinson). Check out this photo of Brendan hanging with his co-stars on set, and speculate with us about what the soon-to-be-former homeschooler might be up to in the new season.

“I mean. I just love them @lucyhale @brendanrobinson1 @officialtamminsursok,” Janel Parrish (Mona) adorably captioned a photo of herself, Brendan, Lucy Hale (Aria), and Tammin Sursok (Jenna) snuggled into the frame. Pretty Little Liars is currently busy filming Season 5, Episode 6, so does this mean all of these characters will be in the episode?! It looks like the 100th episode (Season 5, Episode 5) isn’t the only cast-heavy installment we can look forward to.

Is anyone else unsettled by this group of characters together? Are they sharing a scene together? And, if so, what are they up to? If it weren’t for Aria’s presence, we might assume this is a meeting of Villains Anonymous, aka the Rosewood support group for recovering villains. Instead, we’re going to have to assume they are in class or something. (Though, we suppose Aria could be a recovering villain. Nothing on this show would surprise us.)

So, why is Lucas coming back into the fold for Season 5? We don’t have a definitive answer... yet. All we know so far is that, according to Marlene King, “Lucas will leave his bunk beds and head back to Rosewood High,” for the Season 5 premiere. Lucas has been off of the Liars’ radar since he decided to leave Rosewood High and continue his education with homeschooling in mid-Season 3. Does Alison’s return to Rosewood spur his return to public high school — don’t think we haven’t noticed the timing — or is it something else? And is Lucas on the Liars side, or has he always been a much more nefarious force?

What do you think Lucas is up to in Season 5? Share your theories in the comments below!

Pretty Little Liars Season 5 premiere on Tuesday, June 10, 2014 at 8 p.m. ET on ABC Family.

Kayti Burt is a contributing writer for Wetpaint Entertainment with a penchant for all things pop culture. Follow her on Twitter and Google+!