|The House of Zod|
|Season 3, Episode 18 (54)|
PART 4 OF 8: ANCIENT GRUDGE BREAK TO NEW MUTINY- Zod and Karen make slow recoveries. Kara and Lena look into the Kryptonian archives to uncover the origin of the animosity betwixt the El and Zod bloodlines. Meanwhile, Thomas Coville manipulates Kara's good nature for his own ends. On Earth, Alex breaks into the Lane home in search of answers about the Phantom Zone.
- Melissa Benoist as Kara Danvers/Supergirl & Alura Zor-El
- Chyler Leigh as Alex Danvers
- Katie McGrath as Lena Luthor
- Laura Benanti as Astra In-Ze & Brainiac
- Zachary Quinto as General Dru-Zod
- Tyler Hoechlin as Jor-El (flashbacks)
- Odette Annable as Reign (hologram)
- Jenna Dewan as Lucy Lane/Superwoman
- 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 (credit only)
- Harry Lennix as Commander Fer-Gor
- Chad Lowe as Thomas Coville
- Alison Brie as Faora Zod (flashbacks)
- Daniel Sharman as Lor-Zod (flashbacks)
- and Jeffrey Dean Morgan as Ran-Zod (flashbacks)
- Antagonists: Lesla-Lar, Gor, Ran-Zod (past), Dru-Zod (past)
- Kal and J'onn do not appear in this episode.
- First appearances of Faora and Lor-Zod after being mentioned throughout the season.
- This episode is concurrent with Nova Day and The Swarm, taking place during the evening of June 24, 2020.