Kara and Lena track Lex to Kaznia, and find Eve but no Lex. Ben abandons his son to go after his wife's killer, which pits him against Brainiac-5, Dreamer, and the newly superpowered James. Alex and Kelly travel to meet with a woman giving birth to a child who could become Alex's.
Season Number: 4
Episode Number: 20
Episode Title: Will the Real Miss Tessmacher Please Stand Up?
Air Date: May 5, 2019