|The House of Zod|
|Season 3, Episode 20|
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, Lesla manipulates Kara's good nature for her 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)
- Floriana Lima as Maggie Danvers (credit only)
- Odette Annable as Samantha Arias (credit only)
- Jenna Dewan as Lucy Lane/Superwoman
- with Claire Holt as Karen Starr
- and David Harewood as J'onn J'onzz (credit only)
- Harry Lennix as Commander Fer-Gor
- Chris Vance as Non (flashbacks)
- Tracy Spiridakos as Lesla-Lar
- Dianna Agron as Raya Zod-El
- Paige Turco as Lara Lor-Van
- Casper Crump as Vandal Savage
- Alison Brie as Faora Zod (flashbacks)
- Daniel Sharman as Lor-Zod (flashbacks)
- Emmy Rossum as Zaora Dru-Zod
- and Jeffrey Dean Morgan as Ran-Zod (flashbacks)
- Antagonists: Lesla-Lar, Gor, Ran-Zod (past), Dru-Zod (past)
- Winslow, Kal, Maggie, Sam, and J'onn do not appear in this episode.
- This is the first episode in which Alura appears where she is not portrayed by Laura Benanti. She appears in flashbacks to her youth.
- 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.