Series Cast 21

1. 

   Kayvan Novak

   Brains / GDF Commander (voice) (78 Episodes), Brains / Dr. Meddings (voice) (26 Episodes)

2. 

   Rasmus Hardiker

   Scott Tracy / Alan Tracy (voice) (78 Episodes)

3. 

   Chris Jarman

   The Mechanic / Hutch (voice) (78 Episodes)

4. 

   David Menkin

   Virgil Tracy / Gordon Tracy (voice) (78 Episodes)

5. 

   David Graham

   Parker / Vic (voice) (78 Episodes)

6. 

   Sandra Dickinson

   Grandma Tracy (voice) (78 Episodes)

7. 

   Jenna Coleman

   Baines (voice) (78 Episodes)

8. 

   Adjoa Andoh

   Colonel Casey (voice) (78 Episodes)

9. 

   Thomas Brodie-Sangster

   John Tracy (voice) (78 Episodes)

10. 

    Angel Coulby

    Kayo (voice) (78 Episodes)

11. 

    Rosamund Pike

    Lady Penelope (voice) (78 Episodes)

12. 

    Teresa Gallagher

    EOS (voice) (78 Episodes)

13. 

    Tom Rosenthal

    Brandon Berrenger (voice) (1 Episode)

14. 

    Jack Whitehall

    Francois Lemaire (voice) (1 Episode)

15. 

    Reece Pockney

    Paul Travers (voice) (1 Episode)

16. 

    Mark Gatiss

    Dr. Quentin Questa (voice) (1 Episode)

17. 

    Asa Butterfield

    Space Controller Conrad (Voice) (1 Episode)

18. 

    David Tennant

    Tyco Reeves (Voice) (1 Episode)

19. 

    Emilia Clarke

    Doyle (Voice) (1 Episode)

20. 

    Sylvester McCoy

    Aezethril the Wizard (voice) (1 Episode)

21. 

    Lee Majors

    Jeff Tracey (voice) (1 Episode)

Series Crew 7