|Season 3, Episode 13|
|Supergirl Reborn||You Ruin Me|
PART 1 OF 2: BLOOD IS THICKEST- When Lois Lane arrives on her nationwide "Clark hunt", Lucy is forced to relive some painful memories. As Alex helps Kara readjust to life on Earth, Lena faces the reality of her brother's madness when Lex tries to wrestle LCorp from her. Sam discovers more of the truth about her past. Astra confronts Alura on her inaction when Kara returned to Earth.
- Melissa Benoist as Kara Danvers/Supergirl
- Chyler Leigh as Alex Danvers/Batwoman
- Katie McGrath as Lena Luthor
- Laura Benanti as Alura Zor-El & Astra In-Ze
- Tyler Hoechlin as Clark Kent (flashbacks)
- Floriana Lima as Maggie Danvers
- Zachary Quinto as General Dru-Zod
- Odette Annable as Samantha Arias/Reign
- Jenna Dewan as Lucy Lane
- with Claire Holt as Karen Starr
- and David Harewood as J'onn J'onzz
- Dianna Agron as Raya Zod-El
- Minka Kelly as Lois Lane
- Andrea Brooks as Eve Teschmacher
- Emma Tremblay as Ruby Arias
- Robert Gant as Zor-El (simulation)
- Wallis Day as Nyssa-Vex
- and Billy Zane as Lex Luthor
- Antagonist: Lex Luthor
- Winslow does not appear in this episode.
- Clark appears briefly in flashbacks.
- First appearance of Lois.
- 2nd stand-alone episode of the season.
- This episode takes place on June 11, 2020.