Säsongens återkommande skådespelare 4

1. 

   Phillip Van Dyke

   Arnold (voice)

2. 

   Francesca Marie Smith

   Helga Pataki (voice)

3. 

   Jamil Walker Smith

   Gerald Johanssen (voice)

4. 

   Dan Castellaneta

   Grandpa Phil (voice)

Gästskådespelare 9

1. 

   Anndi McAfee

   Phoebe Heyerdahl (voice)

2. 

   Justin Shenkarow

   Harold Berman (voice)

3. Christopher Walberg

   Stinky Peterson (voice)

4. 

   Ben Diskin

   Eugene Horowitz (voice)

5. 

   Craig Bartlett

   Brainy (voice)

6. 

   Maurice LaMarche

   Big Bob Pataki (voice)

7. 

   David Wohl

   Mr. Berman (voice)

8. 

   Dan Butler

   Mr. Simmons (voice; uncredited)

9. 

   Kath Soucie

   Mrs. Berman (voice)

Medarbetare 2