Throughout Supergirl Season 5, Lena Luthor has quietly plotted her revenge on Kara and ensure that she would never be betrayed again, with a project known as Non Nocere. In an upcoming episode, this scheme comes to head with Lena turning to her estranged older brother Lex Luthor.
The CW has released the official synopsis for the season 18th episode, titled “The Missing Link,” that has the Luthor siblings team up as Project Non Nocere fails. Meanwhile, Supergirl’s battle against one of the season’s overarching villain Rama Khan continues when the ageless antagonist resurfaces.
LENA DISCOVERS THE CONSEQUENCES OF PROJECT NON NOCERE – Supergirl (Melissa Benoist) and the team go head to head against Rama Khan (guest star Mitch Pileggi) and Leviathan. Meanwhile, Lena (Katie McGrath) and Lex (guest star Jon Cryer) must join forces when Project Non Nocere fails, leaving the two siblings in serious danger. Avi Youabian directed the episode written by Dana Horgan & J. Holtham (#518). Original airdate 5/10/2020.
Lena’s project had targeted the part of the brain that programmed loyalty, with Lena creating the initiative after learning her best friend Kara Danvers had concealed her true identity from her all along. With Lex back and looking to work with his sister together to consolidate power, the Luthors may have confronted a threat beyond their control in Leviathan.
Returning Sunday, May 3 at 9 p.m. ET/PT on The CW, Supergirl stars Melissa Benoist as Kara Danvers, David Harewood as Martian Manhunter and Chyler Leigh as Alex Danvers.
As Kara takes the fight to Leviathan, Lena Luthor's plot takes a surprise turn in an upcoming episode of Supergirl.