Melissa Benoist as Kara Danvers in Supergirl CBS

Supergirl is close to its finale and things are not looking good for Kara as Maxwell has learned that she and Alex are sisters and that she is the superhero. The upcoming episode is titled Strange Visitor From Another Planet. It will mostly focus on Hank Henshaw aka J'onn J'onzz, who is struggling with his past as a Green Martian.

Warning: Potential spoilers ahead.

TV Guide has reported that episode 11 will reveal that the White Martians conducted a mass genocide of the Green Martians – J'onn's clan. The upcoming episode will see a lot of drama as Kara and her sister would learn about Hank's truth after the arrival of a White Martian.

David Harewood, who plays J'onn, told the website that his character will face a lot of trouble in the upcoming episodes. "Not only is he in trouble because he's not who he says he is, but he's also an alien at the heart of this government organization. If he's not careful, this will not end well.

"It's okay for Kara to say, "It's all right. Come out and be who you really are," but if Hank does come out as who he really is, heads are going to roll. Everything is going to be a little too hot and [there will be] too many questions for it to go smoothly," he told TV Guide.

The official synopsis of the episode reads as follows:

Kara must help Hank face his painful past when a White Martian, a member of the alien race that wiped out his people, kidnaps Senator Miranda Crane (Tawny Cypress), an anti-alien politician. Also, Cat's estranged son, Adam (Blake Jenner), arrives in National City.

Meanwhile, Harewood also hinted that Hank will develop fatherly love for Kara and her sister Alex. "J'onn J'onnz had two daughters that he lost. [Alex and Kara] lost a father, so in a way each of them becomes his daughters. He's a father figure to them. We see them move forward. It's family bond," he told the website.

Supergirl airs every Monday at 8pm EST on CBS. In case you miss the episode, click here to watch it the next day on the network's official website, only in the US. The series will see the appearance of Superman in season 1's upcoming chapter.