Arrow has cast two recurring characters for season 4: Mister Terrific and Anarky.

Echo Kellum will play Mister Terrific, aka Curtis Holt, reports Entertainment Weekly. He is being described as “a technological savant and inventor.” He’ll be working under Palmer Technologies’ new boss, Felicity Smoak. He will first appear in Arrow season 4, episode 2.

We also learned in the Arrow Comic-Con panel that Mister Terrific will be gay.

Kellum’s other credits include Sean Saves the World, Ben and Kate and A to Z.

Related: Arrow at SDCC: Talking dynamics in the Arrow cave and Damien Darhk

In the DC comics, Mister Terrific was originally the mantle of Terry Sloane, a self-made millionaire, Olympic-level athlete and martial artist. Terry Sloane’s successor was Michael Holt, the third smartest man in the world and another Olympic-level athlete who took to fighting crime after the deaths of his wife and unborn child.

Furthermore, Alexander Calvert will join Arrow season 4 as Anarky, reports Comic Book Resources. According to the character description, “Lonnie Machin (AKA Anarky) is a deranged freelancing criminal who is willing to do whatever it takes to impress a potential employer.”

Related: Epic Arrow, Flash, Legends of Tomorrow video traces the evolution of a hero

In the DC comics, Anarky is a Batman rogue. He is teenager who believes in anarchism. A prodigy, he invents gadgets to attempt to improve society by subverting the government.

Like Mister Terrific, Anarky will debut in Arrow season 4, episode 2. The role will also be recurring.

Kellum and Calvert join a growing cast for season 4, which is led by Neal McDonough; he will play new Big Bad Damien Darhk.

Watch the Comic-Con Arrow highlight reel below:

Arrow season 4 premieres Wednesday, October 7 at 8:00 p.m. ET on The CW.

Are you looking forward to seeing Mr. Terrific in ‘Arrow’ season 4?