|The Fall of Kandor|
|Season 3, Episode 23|
|Hurricane||City On Fire|
PART 1 OF 2: NEW KRYPTON MAKES ITS FINAL STAND- As Brainiac unleashes an army of drones to lay waste to Kandor, Alura discovers the true mastermind behind recent events. As Kara, Astra, Karen, Zod, Non, and the rest of Krypton's military combat Brainiac and its allies, J'onn shows up in Kandor. Amidst the chaos, Lesla finally starts her coup.
- Melissa Benoist as Kara Danvers
- Chyler Leigh as Alex Danvers (credit only)
- 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 & Cyborg Superman
- Floriana Lima as Maggie Danvers (credit only)
- Odette Annable as Reign
- Jenna Dewan as Lucy Lane/Superwoman
- with Claire Holt as Karen Starr
- and David Harewood as J'onn J'onzz
- Emmy Rossum as Zaora Dru-Zod
- Amy Acker as Brainiac & Vril Dox
- Chris Vance as Non
- Tracy Spiridakos as Lesla-Lar
- Paige Turco as Lara Lor-Van
- Casper Crump as Vandal Savage
- Chris Browning as Ben Krull/Reactron
- Georgina Campbell as Lieutenant Asha Del-Nar
- Robert Gant as Zor-El (hologram)
- Wallis Day as Nyssa-Vex
- with Billy Zane as LX-13
- and Dianna Agron as Raya Zod-El
- Antagonists: Brainiac, Lex Luthor, Vril Dox, Lesla-Lar, Lucy Lane, Ben Krull, Cyborg Superman, Vandal Savage
- Alex, Winslow, Sam, and Maggie do not appear in this episode.
- This episode takes place on June 30, 2020.
- As with several episodes this season, this episode is set entirely on New Krypton.