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 12

1. 

   Danielle Nicolet

   Cecile Horton

2. 

   Patrick Rinehart

   A.R.G.U.S. Guard

3. 

   Ryan Alexander McDonald

   Neil Borman / Fallout

4. 

   Kim Suzanne Engelbrecht

   Marlize DeVoe / The Mechanic

5. 

   Donna Pescow

   Dr. Sharon Finkel

6. Victoria Askounis

   Young Caitlin

7. 

   Adil Zaidi

   A.R.G.U.S. Scientist

8. Nathan Barrett

   Pizza Dude

9. 

   Samantha Hum

   Technician

10. 

    Neil Sandilands

    Clifford DeVoe / The Thinker

11. 

    David Ramsey

    John Diggle / Spartan

12. 

    Morena Baccarin

    Gideon (voice) (uncredited)

Ekipa 4