|Season 3, Episode 3|
|No Longer The Last||Power Girl|
DO THEY COME IN PEACE?- As Alura and Astra continue showing Kara and Clark around Kandor, J'onn infiltrates the city under suspicions that Alura does not desire genuine peace with humanity. Elsewhere, Lesla-Lar steals into the Labor Guild's headquarters searching for information about how to defeat Brainiac. Karen escapes from Kandorian guards.
- Melissa Benoist as Kara Danvers/Supergirl
- Chyler Leigh as Alex Danvers (credit only)
- Jeremy Jordan as Winn Schott (credit only)
- Katie McGrath as Lena Luthor (credit only)
- Laura Benanti as Alura Zor-El & Astra In-Ze
- Zachary Quinto as General Dru-Zod
- Tyler Hoechlin as Clark Kent & Jor-El
- Floriana Lima as Maggie Danvers (credit only)
- Odette Annable as Reign (hologram)
- Jenna Dewan as Lucy Lane (credit only)
- with Claire Holt as Karen Starr
- and David Harewood as J'onn J'onzz
- Harry Lennix as Commander Fer-Gor
- Chris Vance as Non
- Tracy Spiridakos as Lesla-Lar
- Paige Turco as Lara Lor-Van
- Casper Crump as Vandal Savage
- Robert Gant as Zor-El
- Wallis Day as Nyssa-Vex
- Matt Barr as Tyr-Van
- and Jeffrey Dean Morgan as Ran-Zod (flashbacks)
- Antagonist: Dru-Zod
- Alex, Winn, Lena, Sam, Maggie, and Lucy do not appear in this episode.
- With the exception of Vandal Savage, no human characters appear in this episode.
- This is the first episode since Pilot that Jor-El physically appears. In a nod to Smallville, he is portrayed as looking identical to Clark in his youth.
- This episode is set entirely within Kandor.
- This episode takes place on June 3, 2020.