Stała obsada sezonu 6

1. 

   Grant Gustin

   Barry Allen / The Flash

2. 

   Candice Patton

   Iris West-Allen

3. 

   Danielle Panabaker

   Dr. Caitlin Snow / Killer Frost

4. 

   Carlos Valdes

   Cisco Ramon / Vibe

5. 

   Tom Cavanagh

   Harrison 'Harry' Wells

6. 

   Jesse L. Martin

   Joe West

Goście specjalni 17

1. 

   Emily Bett Rickards

   Felicity Smoak

2. 

   Dominic Purcell

   Mick Rory / Heat Wave

3. 

   Franz Drameh

   Jefferson 'Jax' Jackson / Firestorm

4. 

   Jeremy Jordan

   Winn Schott

5. 

   Russell Tovey

   Ray Terrill / The Ray

6. 

   Caity Lotz

   Sara Lance / White Canary

7. 

   Victor Garber

   Dr. Martin Stein

8. 

   Stephen Amell

   Oliver Queen / Green Arrow / Dark Arrow

9. 

   Paul Blackthorne

   Quentin Lance

10. 

    Juliana Harkavy

    Dinah Drake / Black Canary

11. 

    Melissa Benoist

    Kara Danvers / Supergirl / Overgirl

12. 

    Wentworth Miller

    Leo Snart / Citizen Cold

13. 

    Brian Cook

    Nazi

14. 

    Brett Alexander Davidson

    Nazi Facility Guard

15. 

    Frederick Schmidt

    Metallo-X (voice)

16. Micah Steinke

    Nazi Soldier

17. 

    Chyler Leigh

    Alex Danvers

Ekipa 7