Storm clouds are gathering over National City in the next episode of Supergirl when Kara (Melissa Benoist) goes toe to toe with Red Tornado (Iddo Goldberg).

Kara will meet her cyclone adversary initially as Dr. T.O. Morrow, who arrives at the DEO with General Lane (Glenn Morshower) to help test Kara's powers. As comic book readers already know, General Lane becomes a long-term nemesis for Supergirl, so his introduction with Red Tornado will be a pivotal step in Kara's journey.

TVGuide.com talked to Goldberg about what Morrow's plans are when he arrives and why Red Tornado will be such a menacing force for the Kryptonian hero.

What does that name T.O. Morrow say about your character?

Goldberg: It's a play on the word tomorrow because he's fascinated with the future and pretty much ahead of his time.

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Can you tease what Morrow's relationship with General Lane is and how we'll meet them?

Goldberg: They are working on a military experiment. General Lane comes to the DEO under the premise of testing Supergirl. They want to test Supergirl and this new android so in the future they can create a military cyclone shield. Dr. T.O. Morrow and General Lane have been working on this project for a while. We don't know how long, but I can tell you that T.O. Morrow has been working on tornadoes possibly for most of his life. The character, the entity and the android have been on Morrow's mind probably forever.

What does he have against Supergirl that makes him want to target her now?

Goldberg: When we meet Dr. Morrow and General Lane as they come to the DEO, Morrow is basically an employee of the military. We don't necessarily have a problem with Supergirl. He's just the genius that created the android. It's only later in the episode that things go awry and wreak havoc that people start taking sides. The real contest is between Red Tornado and Supergirl.

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In the comic books, Red Tornado eventually becomes a hero. Does your Red Tornado have that same potential?

Goldberg: At the moment, we're only going to see him as a villain. He is definitely a villain for the time being.

What is it that makes Red Tornado such a menacing villain for Supergirl?

Goldberg: He can create a tornado in the palm of his hand. Once you have something that can create that force and power, and that becomes rogue and out of control, it can destroy everything.

What are you most excited for people to see in this episode?

Goldberg: The action sequences. They blew my mind. I obviously knew that Andrew Kreisberg and Greg Berlanti are going to make this an amazing show, but the action sequences that I was a part of were just so huge. The locations and the way they were shot were so grand. It was more like being on a blockbuster movie. I have definitely never seen something as grand in size. I would say that people are really going to be blown away by it.

Supergirl airs Mondays at 8/7c on CBS.

(Full disclosure: TVGUide.com is owned by CBS)