Ep 19. Alex

Alex Danvers, Supergirl's adoptive sister, is the focus of season 2 episode 19 titled "Alex." In this episode, Alex is kidnapped by a mysterious organization and Supergirl and Maggie Sawyer, her girlfriend and a detective in the National City Police Department, must work together to find her.

The episode dives into Alex's backstory, including her coming out as a lesbian and struggling to come to terms with her identity. It explores how she copes with the pressure of being a government agent and balancing her personal life. In addition to this, the episode also explores the relationship between Alex and Maggie.

As Supergirl and Maggie search for Alex, they come across several clues that lead them to believe that she has been taken by a group that is trying to harvest her alien DNA. This puts them in a race against time to find her before it's too late. Along the way, they face several obstacles and challenges, including conflicting opinions on how to proceed with the investigation.

As they continue their search for Alex, Supergirl and Maggie must also confront their personal issues, which threaten to derail their mission. This includes Maggie's fear of losing Alex and Supergirl grappling with her own feelings for Mon-El.

Despite the challenges, they eventually find Alex and engage in a thrilling fight sequence to rescue her from the clutches of her captors. The episode ends with Alex reuniting with her colleagues and loved ones, and Supergirl and Maggie's relationship taking a new turn.

Overall, "Alex" is an emotional and action-packed episode that explores the complexities of identity and relationships. Fans of the show will enjoy the character development and the high-stakes rescue mission.