| "Fight or Flight" | |
|---|---|
| Supergirl episode | |
| Episode no. | Season 1 Episode 3 |
| Directed by | Dermott Downs |
| Written by | Michael Grassi Rachel Shukert |
| Production code | 4X7603 |
| Original air date | November 9, 2015 |
| Guest appearance(s) | |
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"Fight or Flight" is the third episode in the first season of the CBS television series Supergirl, which aired on November 9, 2015. It was written by Michael Grassi and Rachel Shuker, and directed by Dermott Downs.
The episode centers on Kara taking on Reactron, who has come to National City to seek revenge on Superman by killing Supergirl, while at the same time take on Cat's plans to do an expose on Supergirl.
Picking up from the previous episode, Cat interviews Supergirl, asking uncompromising questions about the timing of her appearance and her relationship to Superman, causing Kara to accidentally reveal he is her cousin - news which makes it onto TV the next day. Cat writes an exposé on Supergirl, painting her as having all the stereotypical negative traits of a millennial. Alex isn't pleased about this, and neither is Hank; Alex is also not happy when she discovers Winn and James know her secret identity.
While assisting at a major car accident, Supergirl is attacked by Reactron, a disfigured man in nuclear-powered armor. Kara managed to damage his armour but he escapes, but the DEO refuse to act against him because he is not an alien threat. Back at CatCo, Winn reveals that he and James have built a high-tech lab in a disused office for them to use as a base of operations. Across town at Lord technology labs, Maxwell is overseeing his train project when Reactron storms in looking for someone who can repair his suit. Maxwell offers himself in place of another scientist, and Reactron takes him hostage. Kara and the DEO discover Reactron is Ben Krull, who worked in a nuclear reactor where Superman prevented a reactor meltdown, saving nearly everyone inside - except for Ben's wife. He blames Superman for her death and created the Reactron armour in order to take revenge, targeting Supergirl to hurt Superman.
The DEO find Reactron's hideout and Kara races there. Lord has repaired Reactron's armour and he fights Supergirl, overpowering her, and she is saved by Superman. When she recovers, Kara is angry that James called in Clark to help her, and asks James to leave. Back at the DEO, Hank's eyes glow red, and when he catches Alex using DEO information to help Kara; he agrees to secretly help out.
At the magazine launch party for the Supergirl issue of CatCo magazine, Maxwell tries to get Cat to talk about Supergirl without success. Kara shares a dance with Winn, then James cuts in to patch things up, but before they can finish their conversation, Reactron breaks in searching for Supergirl. Kara stops him, saving Maxwell and Winn, while James diverts Reactron's attention. Kara learns from Alex that removing Reactron's power core will render him powerless, but it will melt down dangerously, unless encased in lead. Kara saves James, then fights Reactron and extracts the power core with a hand coated in lead she melted from a statue. Afterwards, Kara thanks Alex and Hank for their help.