|Season 5, Episode 15|
|Promises||In The Light|
- Melissa Benoist as Kara Danvers/Supergirl
- Chyler Leigh as Alex Danvers
- Katie McGrath as Lena Luthor
- Odette Annable as Reign/Samantha Arias
- Tyler Hoechlin as Clark Kent (credit only)
- with Claire Holt as Karen Starr/Power Girl
- and Mehcad Brooks as James Olsen
Special Guest StarsEdit
- Dean Cain as Jeremiah Danvers
- Helen Slater as Eliza Danvers
- Laura Benanti as Astra In-Ze (dreams)
- Manu Bennett as Kalibak
- Antagonist: Reign
- Clark does not appear in this episode.
- This episode takes place on December 23, 2020.
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