|The Trial of Kal-El|
|Season 3, Episode 15 (51)|
PART 1 OF 8: KAL AND NAR ON TRIAL FOR TREASON- When Kal-El and Asha Del-Nar are placed on trial for treason, with Zod as the prosecution, Alura wrestles with the morality of potentially executing her nephew versus upholding the law. Astra brings Kara and Lois to New Krypton to bid him farewell should he be found guilty. An assassin plans to murder Zod. Meanwhile, on Earth, Reign moves forward with her agenda.
- Melissa Benoist as Kara Danvers/Supergirl
- Chyler Leigh as Alex Danvers
- Katie McGrath as Lena Luthor
- Laura Benanti as Alura Zor-El & Astra In-Ze
- Zachary Quinto as General Dru-Zod
- Tyler Hoechlin as Kal-El
- Odette Annable as Samantha Arias/Reign
- Jenna Dewan as Lucy Lane
- Dianna Agron as Major Raya Zod-El
- Emmy Rossum as Zaora Dru-Zod
- Brenda Strong as Lillian Luthor
- Wallis Day as Junior Magistrate Nyssa-Vex
- with Claire Holt as Karen Starr
- and David Harewood as J'onn J'onzz
- Harry Lennix as Commander Fer-Gor
- Mackenzie Gray as Kor-Zod
- Chad Lowe as Thomas Coville
- Gregg Henry as Ral-Dar
- Amy Jackson as Imra Ardeen
- Minka Kelly as Lois Lane
- Skyler Samuels as Rei Kon-Vex
- Georgina Campbell as Lieutenant Asha Del-Nar
- Anjali Jay as Indra Nim Gosa
- and Bianca Lawson as Lieutenant Tara Ky-Gor
- Antagonists: Dru-Zod, Alura Zor-El
- This episode is Clark-centric.
- This episode is set on June 23, 2020.
- This episode marks Alex and J'onn's 50th appearances on the show.