Series Cast 13

1. 

   Spencer Klein

   Arnold (voice) (31 Episodes)

2. 

   Francesca Marie Smith

   Helga Pataki (voice) (31 Episodes)

3. 

   Jamil Walker Smith

   Gerald Johanssen (voice) (31 Episodes)

4. 

   Justin Shenkarow

   Harold Berman (voice) (31 Episodes)

5. 

   Dan Castellaneta

   Grandpa Phil (voice) (31 Episodes)

6. Christopher Walberg

   Stinky Peterson (voice) (31 Episodes)

7. 

   Haley Joel Osment

   — (1 Episode)

8. 

   Henry Gibson

   — (1 Episode)

9. 

   Zelda Rubinstein

   — (1 Episode)

10. 

    Adam Wylie

    — (1 Episode)

11. 

    Michael McKean

    — (1 Episode)

12. 

    Kathie Lee Gifford

    — (1 Episode)

13. Michael Levin

    Ray Doppel (voice) (1 Episode)

Series Crew 3