Mr. Perlstein, voiced by Elliott Gould, is Arnold's father. He appears in In the Haunted House, Going Batty, Rocks and Rolls, Holiday Special, and Goes Cellular. It is revealed in Janet's Mystery Gene that his brother is Janet's dad.
Relatives[]
- Mrs. Perlstein (wife)
- Arnold Perlstein (son)
- Janet Perlstein (niece)
- Unnamed parents
- Janet's father (brother)
- Janet's mother (sister-in-law)
- Unnamed mother-in-law
- Arizona Joan (aunt/-in-law)
Trivia[]
- Arnold seems to get his catchphrase from his dad. This is implied when Mr. Perlstein says "Maybe we should've stayed home tonight" in his speaking debut episode.
| Parents | Mr. Perlstein | Mrs. Perlstein | Mr. Hudson | Mrs. Hudson | Mr. Ramon | Mrs. Franklin | Mr. Terese | Dr. Tennelli | Mrs. Li |
|---|---|
| Siblings/Cousins | Murph* | Evan Hudson | |
| Friends | Professor Cornelia C. Contralto II* | R.U. Humerus* | Dr. Skeledon* | Molly Cule* | |
| Pets | Wanda's Dog* | Noodles |
| Other Characters | Mr. Seedplot* | The Baker* | Mr. Junkett* | Harry Herp* | Gerri Poveri** | |
| Perlstein family |
| Arnold · Janet |