'Pretty Little Liars' season 5 is returning with episode 21 this Tuesday night and the suspense in the hit teen drama series is skyrocketing, with more clues on A's identity being uncovered. So far, only Aria's brother Mike might have an idea on who A really is, but given that this is PLL, the twists will surely shock fans until the big reveal moment. Could Mike be A or could he be helping A in realising all her dark plans since season 1? Find out by tuning in on ABC Family at 8 p.m. EST tonight. Watch 'Pretty Little Liars' season 5 episode 21 stream using the free online stream link at the end of this post.

Note: This feature contains spoilers on the upcoming episode of 'Pretty Little Liars' Season 5. Please read at your own risk.

So far PLL Season 5 has been a confusing labyrinth of deception for the liars. There is still the big mystery on A's real identity while each of the girls face different personal problems. However, things are looking brighter in terms of more clues that could help Aria and the girls solve the puzzle that is A. This week, the liars will find out that Aria's brother Mike apparently knows a lot about Mona than they had thought. What's more is that a grim discovery about their friend Alison is about to emerge when they try to unearth the secrets about their dead frenemy. Watch 'Pretty Little Liars' season 5 episode 21 online through the free online stream link available below.

Spoilers revealed ahead of the all-new episode's air date that the liars are going face-to-face with Alison, only for them to realize that they have made a devastating mistake in accusing Ali that she's A. They have new clues about Mona abut they are not sharing it to Alison since Aria has yet to confirm the gravity of Mike's involvement with Mona. Things will then get pretty intense from there since the repercussions of Mike's actions will greatly affect Aria and her family. Don't miss the exciting show tonight. Watch it online using the 'Pretty Little Liars' season 5 episode 21 free online stream link found at the end of this post.

Interestingly, actor Cody Christian, who plays Mike Montgomery on the ABC Family show, recently dished about his character's storyline in the upcoming episode. "You'll definitely know why Mike Montgomery had his name on the visitor log. Mike's really starting to expand as a character, so he'll have different scenes with a lot of different characters coming up," the actor said. "It's a big one. You will never forget this finale, I promise you." He also gushed about the series' finale saying, "In the season finale, more than any of the other seasons, this is where we're going to get the most answers. And I mean answers. You're going to see how all of these secrets that have been haunting the Liars really catch up to them in this finale. It's a big one. It's pretty crazy. You will never forget this finale, I promise you."

The official synopsis of 'Pretty Little Liars' season 5 episode 21 reads: "Equipped with their new information about Mona, the Liars decide they need to speak to Alison. But once the truth is out there, Aria quickly learns that Mike's involvement with Mona and this new revelation could have serious repercussions for her family. Determined to keep Mike safe and get Ali out of jail, the Liars intensify their search for information on "A"."

"Meanwhile, Spencer heads to London for an important college interview, and Alison looks to someone surprising for help with her murder trial."

'Pretty Little Liars' stars Lucy Hale, Troian Bellisario, Shay Mitchell, Ashley Benson, Sasha Pieterse, Janel Parrish, Ian Harding, Tyler Blackburn and Keegan Allen, among others.

"Pretty Isn't The Point" is to air this Tuesday night at 8 p.m. EST on ABC Family. Watch Pretty Little Liars season 5 episode 21 stream using this free online stream link here.