Ep 19. The Fanatical

Supergirl season 3 episode 19, titled "The Fanatical," follows Kara Danvers (aka Supergirl) as she faces a new threat in National City. The episode starts off with Kara and her team at the DEO investigating the disappearance of a young woman named Ruby Arias. Meanwhile, the city is plagued by a new group of vigilantes called the Children of Liberty, who are attacking anyone they deem to be "alien."

Kara's sister Alex is busy dealing with her own issues when she discovers that her girlfriend, Maggie, has been keeping a secret from her. This personal drama adds to the tension of the episode as Kara struggles to find Ruby and stop the Children of Liberty.

As the investigation continues, Kara and her team discover that the Children of Liberty are being led by Agent Liberty, a mysterious and dangerous man who appears to be motivated by a deep hatred of aliens. Along the way, Supergirl teams up with her old friend Lena Luthor to try and stop Agent Liberty and his followers before they can cause more harm.

As the tension builds, Supergirl is forced to confront some difficult truths about her own identity and the role she plays in National City as both a hero and an alien. Along the way, she learns some important lessons about the power of hope and the importance of standing up for what is right, no matter the cost.

Overall, Supergirl season 3 episode 19 is a thrilling and action-packed installment in the popular superhero series. With great performances from the cast, impressive special effects, and a thought-provoking story, it is sure to be enjoyed by fans of the show and superhero genre alike.