The "Pretty Little Liars" season finale threw a huge amount of new questions at fans once the identity of "A" was revealed. However, one of the biggest surprises came up when show creator Marlene King said that there is one more member of the NAT club that we don't know about yet. The NAT club was a group that consisted of Jason (Drew Van Acker), Ian (Ryan Merriman), Garrett (Yani Gellman), and possibly Jenna (Tammin Sursok). The group spent a lot of time secretly videotaping the pretty little liars, and Ali's (Sasha Pieterse) discovery of the creepy home movies was probably the reason she was killed. So, who could the mystery club member be? Let's take a look at the suspects.
Melissa Hastings (Torrey DeVitto)
It has been clear for quite some time that Melissa had some kind of involvement with Ali's death. Over the last few episodes of Season 2, she became more and more sinister. At first, it seemed as though the NAT club was boys only, but Jenna knew something was going on and may have been more involved with it than first thought. Melissa is the obvious choice for being the final member, but there is a huge flaw with this theory. She was engaged to Ian at the time, and Ian was having a fling with Ali and Spencer (Troian Bellisario). The idea that Ian would allow his fiancée into the group and risk getting caught is highly unlikely.
Lucas Gottesman (Brendan Robinson)
Lucas used to be like a sweet little puppy dog who followed Hanna (Ashley Benson) around with adoring eyes. Sadly, his dark side has been shown on more than one occasion. Firstly, when he trashed Ali's memorial, then when he tried to coax Hanna's boyfriend into a fight, and finally when he stole Caleb's (Tyler Blackburn) savings. These actions aren't exactly indications that he is a terrible person, but the look of evil in his eyes at certain points make him a prime candidate to be part of the NAT club. He was seen with Mona (Janel Parrish) several times, and even with Jenna in the season finale.
Noel Kahn (Brant Daugherty)
While Lucas may have seemed a bit dorky for the cool college guys in the NAT club, Noel has everything the other members had. Good looks, charm and a motive to hate Alison. Noel and Ali used to be friends, until she sabotaged his relationship in order to give Aria (Lucy Hale) a chance with him. For a while, everyone thought Noel was "A" because he was always on the scene when something happened, but that theory somehow took a backseat, and he disappeared. After such a big build-up, it would be surprising if his importance to the storyline was over.
Mike Montgomery (Cody Christian)
Aria's little brother has been something of an oddity. Being a part of the Montgomery family means he has popped up from time to time, but he was given his own storyline in which he got into a lot of trouble for breaking into people's houses. He was once caught by Jason breaking into the DiLaurentis house, but Jason didn't press charges. Jason's feelings for Aria might have influenced his decision, but if Mike was a member of the NAT club, there is no way he would have called the cops on him. Mike has acted strangely at times, hinting he knows more about things than he should. If he isn't in the NAT club, his character is somewhat pointless.