As theTelevision Critics Associationsummer event rolls on, and showrunners and audiences alike prepare for the upcoming fall TV season, alotof news is emerging concerning your favorite series. There’s a good bet that, if you’re reading Collider, some of those shows include DC Comics' TV Universe series like The CW’sThe FlashandDC’s Legends of Tomorrow, and Fox’sGotham. (Even CW Seed is getting in on the action with thefirst-ever superhero series led by a gay character!) It’s news from this trio of live-action WB and DC TV shows that we’ve rounded up for you today.

For casting announcements, first looks, and new images, take a look at our DC TV breakdown below.The Flashkicks off its third season on Tuesday, October 4th at 8pm;Gothamreturns for Season 3 on Monday, September 19th at 8pm; andLegends of Tomorrowstarts its second season on Thursday, October 12th at 8pm. Set your DVRs accordingly!

grey-damon-aquarius

‘The Flash’ Casts Grey Damon as Mirror Master

First up from The CW’sThe Flashis their newest casting announcement.CBRreports thatGrey Damon(Aquarius) will join Season 3 as a major comic book antagonist, Mirror Master. He’ll appear in the fourth episode and will take on the character’s original alter ego of Sam Scudder.

Created byJohn BroomeandCarmine Infantinoand first introduced in 1959’s “The Flash” #105, Scudder was your run-of-the-mill convict who became obsessed with trying to get inside mirrors and his own reflection. Lo and behold he discovered a way to do it and then used this ability to commit crimes and antagonize The Flash. The New 52 also features Scudder as the Mirror Master in a storyline which sees him and other Rogues granted superpowers by an experiment gone wrong, one which inextricably links them with their signature weapons. Scudder, who becomes permanently trapped within the Mirror Realm, blames Captain Cold for this, as do the other Rogues. Intriguing!

mirror-master-sam-scudder

The above image ofBenedict Samuelas the Mad Hatter, who will first appear in the third episode of Season 3 ofGothambut will be a season regular, comes courtesy ofEW. Also known as Jervis Tetch, the Mad Hatter is described as “a talented hypnotist teetering on the edge of madness. He arrives in Gotham with an unwavering desire to find his sister, Alice, a young woman who went missing in the city years ago. It is anyone’s guess just how far down the rabbit hole he’s willing to go in order to find her.”

Let us know what you think of his appearance/description/casting in the comments!

stargirl

‘Legends of Tomorrow’ Casts Sarah Grey as Stargirl

Speaking of casting,IGNreports thatLegends of Tomorrrowhas found its Stargirl in the person ofSarah Grey(Wayward Pines). Grey, who also appears in the upcomingPower Rangersmovie, will take on the role of Courtney Whitmore, a.k.a. Stargirl, a creation ofGeoff Johns, as a tribute to his late sister, who first appeared in “Stars and S.T.R.I.P.E.” #0 in 1999. She’s a member of the Justice Society of America, which will feature prominently in this season, and wields the Cosmic Staff, which allows her the ability to fly and manipulate energy.

Grey will join new additions Hourman (Patrick J. Adams), Amaya Jiwe/Vixen (Maisie Richardson-Sellers), Henry Heywood, Sr./Commander Steel (Matthew MacCaull) and his “grandson” Dr. Nate Heywood (Nick Zano), a.k.a Citizen Steel. Dr. Mid-Nite and Obsidian will also appear but have yet to be cast.

Maisie Richardson-Sellers Roars as Vixen in ‘Legends of Tomorrow’ Poster

Speaking of Richardson-Sellers as Vixen, producerMarc Guggenheimshared the first image of the new take on the character and the new actor playing her: