Comic-Con International just got a little more super. Supergirl stars Melissa Benoist, David Harewood, Jeremy Jordan, Mehcad Brooks, Chris Wood, Odette Annable, Katie McGrath and executive producers Jessica Queller and Robert Rovner stopped by San Diego to discuss the latest details about Season 3.

The panel opened with a Season 3 sizzle reel, in which Kara says. "Kara Danvers was a mistake." According to Kara, trying to be human "was a mistake" and that she is in fact an alien.

"The first two seasons, she's trying to... figure out her identity," Benoist said, describing Kara as trying to strike a balance between Supergirl and her alter ego Kara Danvers. "When we pick up on Season 3, the scale is leaning very heavily on Supergirl."

"I don't think Alex would let Kara not lean on her. I think everyone at this table -- Martian Manhunter, Winn and James -- she has this core group you'll see kind of poke and prod her," she continued.

"The theme of Season 3 is, 'What does it mean to be human?' And all of the characters will really be exploring that character, especially Kara," Queller said.

Adrian Pasdar will play Morgan Edge, a DC villain. Yael Grobglas will play Psy. Carl Lumbly will appear as J'onn J'onzz's father. Emma Tremblay will play a character named Ruby.

Calista Flockhart will appear as Cat Grant in the premiere of Season 3.

"The thing that's so great and so different about this villain, as opposed to Seasons 1 and 2, she has a specific agenda," Annable said of her character Reign.

As for James, Queller said, "He's going to have a new love interest. He's going to step up at CatCo, back to his routes as a journalist... that sort of harkens back to Jimmy Olsen's character." He will also continue his role as Guardian.

According to Brooks, the love interest is what he's most looking forward to, so that he can play "charming."

"Lyra and Winn are still together... I have to imagine that she occasionally goes out with Team Guardian, but we haven't figured that out yet," Jordan shared.

"I love my suit! The cape is so multi-functional, I would never want to lose the cape. If ain't broke, don't fix it," Benoist said of her suit.

"Mon-El will return at some point... how he returns is one of the central mysteries of Season 3," Rovner explained.

"I think the big thing is going to be what actually happens to Mon-El," Wood shared.

"I'm very excited to be working with Carl. He's a very cool actor, and I'm just very excited to be working with him on this show. It's not an easy one. I think there's going to be some complications [between J'onn and his father]... it's going to be extraordinary to find that he's not the last Green Martian, the other one is his father!" Harewood said. "Space dad is going to have a dad."

"Anytime Miss Martian wants to fly back into town, it's fine by me," he added.

"We've had a couple days now with Adrian, and he is a delight. He is the nicest man and the most evil work companion. He switches between the two, and it's quite disconcerting," McGrath revealed.

"I hope in Season 3 that the relationship that Lena and Kara have takes in the rest of the cast," she said. "I'm looking forward to playing with everyone here."

Queller addressed Maggie and Alex's relationship now that Floriana Lima is no longer a series regular. "We have an amazing, beautiful story in her remaining episodes which is emotional and modern... she is always welcome back to the show... we love Maggie and we love Sanders and we are dedicated to them forever," she said.

Asked if Kara may not have a love interest this year, Benoist said, "From what I've seen so far, she really is trusting herself and only herself right now. Obviously, relying on her friends, but she's been pretty self-reliant so far, which is nice."

"We love having Superman on the show, so there no immediate episodes with Superman," Queller revealed. However, schedule permitting, they would have Tyler Hoechlin back.

Returning to The CW on Monday, October 9th at 8 p.m. ET/PT, Supergirl stars Melissa Benoist as the Girl of Steel, David Harewood as Martian Manhunter, Mehcad Brooks as Jimmy Olsen, Chyler Leigh as Alex Danvers and Jeremy Jordan as Winn Schott, with appearances by Calista Flockhart as Cat Grant and Tyler Hoechlin as Superman.