Tonight, "Arrow" season 2 episode 21 will air on the CW, and now fans can watch the live stream online.

In this episode, "Oliver weighs his options after receiving threats from Slade. Meanwhile, Diggle and Felicity go to drastic measures to stop Oliver from confronting Slade; Thea mulls over leaving town; and Laurel continues her push against Sebastian Blood."

For the CW, there is a live stream of the channel which can be accessed here and here (depending on your region, one may be accessible over the other), and through that, fans can watch the "Arrow" season 2 episode 21 live stream online.

There are a lot of fake channels solely for the purpose of luring viewers with ads, but here is how you can avoid any potential hiccups with pop-ups and ads.

--Do not download anything that is suggested.

--For every ad, there is an "X" button. It is typically in a corner or out of the way so it is hard to see. Sometimes ads try to fool you by giving you a fake "X" graphic which leads you to an ad. Do not be discouraged when this happens, the real "X" button is there somewhere.

--Multiple ads will pop and it takes a little bit to clear out each and every ad. Even then, pop-ups will occur as you clear the ads. Do not listen to any of these ads or pop-ups and clear them right away.

--This "Arrow" season 2 episode 21 live stream will have recurring ads that pop up every once in a while. If this is the only way you can view "Arrow" season 2 episode 21, do not be deterred and the live streaming will work once the ads disappear.

Be sure to catch "Arrow" tonight on CW at 8:00pm EST!