Season Regulars 20

1. 

   Henry Corden

   (voice)

2. 

   Allan Melvin

   Additional Voices (voice)

3. 

   Casey Kasem

   Shaggy Rogers / Additional Voices (voice)

4. 

   Julie McWhirter

   Additional Voices (voice)

5. 

   Micky Dolenz

   Supporting Voices / Additional Voices (voice)

6. 

   Don Messick

   Scooby-Doo / Additional Voices (voice)

7. 

   Gary Owens

   Blue Falcon (voice)

8. 

   Virginia Gregg

   Additional Voices (voice)

9. 

   Larry McCormick

   (voice)

10. 

    Heather North

    Daphne Blake (voice)

11. 

    Patricia Stevens

    Velma Dinkley (voice)

12. 

    Bob Holt

    Additional Voices (voice)

13. 

    Daws Butler

    Scooby-Dum / Additional Voices (voice)

14. 

    Frank Welker

    Fred Jones / Additional Voices / Dynomutt (voice)

15. 

    Shirley Mitchell

    Olivia / Additional Voices (voice)

16. Joan Gerber

    Additional Voices (voice)

17. 

    Ron Feinberg

    Additional Voices (voice)

18. Ralph James

19. 

    John Stephenson

    Additional Voices (voice)

20. Regis Cordic

    (voice)

Guest Stars 0

There are no cast records added to The Harum Scarum Sanitarium.

Crew 0

There are no crew records added to The Harum Scarum Sanitarium.