Ep 3. Fight or Flight

Kara(Zor-El), a.k.a. Supergirl, continues her journey of self-discovery as she faces a new nemesis, Reactron in "Fight or Flight", the third episode of Supergirl Season 1. Reactron is wreaking havoc in National City, killing people who were involved in his wife's death. Meanwhile, Kara's identity as Supergirl gets leaked by Cat Grant, leading to unwanted public attention and scrutiny.

Kara is struggling to control her emotions and deal with the consequences of being a hero. She is not used to being in the limelight and the adoration that comes with it. This sudden fame and attention put her in a vulnerable position, making it hard for her to focus on her duty as Supergirl.

Meanwhile, James Olsen, tries to establish a connection with Kara and be her confidante. He tries to share his past with her and how he could understand what she is going through. While initially hesitant, Kara opens up to him and finds comfort in his words.

Back to Reactron, the villain continues to cause havoc in National City and is on a quest to kill anyone who had a role in his wife's death. His powers are the result of a malfunctioning nuclear reactor that he got exposed to. Even Supergirl finds it hard to defeat him single-handedly.

Reactron has a personal vendetta against Superman, and he believes that Supergirl can lead him to his cousin. He kidnaps James and demands Supergirl to bring Superman to him. This puts Supergirl in a tough spot as she must either reveal her relationship with Superman to the world or risk Olsen's life. Kara grapples with this dilemma and makes a tough choice.

The episode is action-packed with intense fight scenes as Supergirl confronts Reactron. Her inexperience as a superhero is evident as she struggles to handle the gravity of the situation. But her compassion and iron-will make up for her lack of experience.

"Fight or Flight" touches upon the theme of identity and consequences of being a hero. It shows the challenges that come with being a superhero and how one's actions can have a ripple effect. It also shows how Kara is still adapting to her newfound powers and is learning to use them wisely.

Overall, "Fight or Flight" is an exciting episode that delves into the complexities of being a hero. The episode sets the tone for the rest of the season and shows how Supergirl is still finding her place in the world. The episode also introduces a formidable villain that sets the bar high for the rest of the season.