‘Arrow’ Season 2 Episode 7 Spoilers: When And Where To Watch ‘State V. Queen’ Online And On TV [VIDEO]

"Arrow" returns with Episode 7 of Season 2 on Wednesday night when "State V. Queen" airs at 8pm EST/7pm Central on the CW. According to a synopsis, in tonight's episode, "a mysterious illness sweeps through the city and infects hundreds of people, including Diggle. Oliver discovers the designer drug Vertigo in Diggle's blood and realizes that the Count has escaped from prison and is once again distributing the drug." Scroll down to the end of the page to check out a preview clip as well as a link to the episode after it airs.

According to Comicbook.com, while all this goes down, Moira (Susanna Thompson) will go on trial for her participation in the Undertaking, and ADA Adam Donner (Dylan Bruce in a guest-star turn) will collapse in court with vertigo symptoms. That will leave Laurel (Katie Cassidy) to step in to try the case against Moira. As the trial goes on, Oliver will be increasingly torn between standing by his family as it happens and catching the Count - the villain who will see a trap he's set for Felicity (Emily Bett Rickards) work out as she tries to follow a lead.

The creators of "Arrow" have also decided to give their hero Oliver Green a mask, which according to Entertainment Weekly will make its debut on the show in December. "Conceptually, it was something we wanted to do because Oliver himself is evolving as the Arrow- from vigilante to hero, sort of from Arrow to Green Arrow - and we wanted to see that progression in his costume as well," executive producer Andrew Kreisberg told EW. "As Oliver is embracing being a hero, being a hero means stepping out of the dark and being more of a symbol, so he has to take steps to conceal his identity more."

Kreisberg added, though, that Oliver Green won't just don the mask for no reason. "He doesn't just put on a mask. It's actually a big plot point in an episode, and there really is a story behind, not only the need for the mask but also who provides him with it," he says. "It's going to be a little bit of a surprise, and once they see how the mask comes into creation, I think people will be really excited about it." Hit the box below to check out a promo clip of Wednesday night's episode, and tune in to the CW at 8 p.m. EST (7 p.m. Central) to watch the new episode as it airs. Can't make it to a TV at that time? No sweat: you can click here to catch the episode online after it airs.