Πρωταγωνιστές του κύκλου 8

1. 

   Melissa Benoist

   Kara Danvers / Supergirl / Kara Zor-El

2. 

   Chyler Leigh

   Alex Danvers / Sentinel

3. 

   David Harewood

   J'onn J'onzz / Martian Manhunter

4. 

   Katie McGrath

   Lena Luthor

5. 

   Jesse Rath

   Querl 'Brainy' Dox / Brainiac-5

6. 

   Nicole Maines

   Nia Nal / Dreamer

7. 

   Sam Witwer

   Ben Lockwood / Agent Liberty

8. 

   Mehcad Brooks

   James 'Jimmy' Olsen / Guardian

Γκεστ σταρ 14

1. 

   Azie Tesfai

   Kelly Olsen / Guardian

2. 

   Bruce Boxleitner

   President Baker

3. 

   April Parker Jones

   Colonel Lauren Haley

4. 

   Izabela Vidovic

   Young Kara

5. Olivia Nikkanen

   Young Alex

6. 

   Mark Krysko

   Head Guard

7. 

   Al McFoster

   Secret Service Agent

8. J.C. Roy

   Guard 1

9. 

   Colby Wilson

   Guard 2

10. Sterling Schneider

    Greta

11. 

    Andrea Brooks

    Eve Tessmacher

12. 

    Helen Slater

    Eliza Danvers

13. 

    Robert Baker

    Otis Graves

14. 

    Brenda Strong

    Lillian Luthor

Συντελεστές 5