Ep 20. Will The Real Miss Tessmacher Please Stand Up?

Supergirl season 4 episode 20, titled "Will The Real Miss Tessmacher Please Stand Up?", focuses on the discovery of Lex Luthor's true plan. As Lena tries to decode Lex's journal, she realizes that he has been manipulating her for years. Meanwhile, Kara and James investigate a series of bombings in National City, which leads them to discover that an imposter has been posing as Eve Teschmacher.

The episode begins with Lena confronting Lex's assistant and former friend, Eve Teschmacher, about her involvement with Lex's plan. Lena asks Eve to translate a page from Lex's journal, but Eve denies any knowledge of the page. Later, Lena realizes that the page was written in code and begins to decode it.

Meanwhile, Kara and James investigate a series of bombings in National City. They discover that the bombs were all made from the same material and are linked to Eve's work at L-Corp. Kara suspects that Eve may be involved with the bombings and confronts her at work. However, Eve denies any involvement and claims that she is being framed.

As Lena continues to decode the journal, she realizes that Lex has been manipulating her for years. She discovers that he cloned her when they were kids and has been using the clone to spy on her ever since. Lena is devastated by this revelation and begins to question her own identity and motives.

Kara and James eventually discover that an imposter has been posing as Eve Teschmacher. The imposter, who is revealed to be a shapeshifter, has been using Eve's identity to carry out the bombings. Kara and James work together to stop the shapeshifter and prevent any more attacks.

In the end, Lena confronts Eve about her involvement with the bombings. Eve admits that she was working with the shapeshifter and Lex to carry out the attacks. She explains that Lex had been blackmailing her and threatening to harm her mother if she did not cooperate. Lena is torn between her anger towards Eve and her sympathy for her situation.

Overall, Supergirl season 4 episode 20 is an intense episode that sheds light on Lex's true plan and the complex relationships between the show's characters. The episode keeps viewers on the edge of their seats as they watch Lena and Kara uncover the truth and try to stop the attacks. Additionally, the episode poses some interesting ethical questions about identity, loyalty, and trust.