In this story, Horton discovers there is a microscopic community of intelligent beings called the Who's living on a plant that only he can hear. Recognising the dangers they face, he resolves to keep them safe. However, the other animals around him think Horton has gone crazy thinking that there are such beings.
Unfortunately the movie Horton Hears a Who! is not yet available on HBO Max.
| Directing | Ben Washam | Director |
| Directing | Chuck Jones | Director |
| Writing | Dr. Seuss | Teleplay |
| Production | Dr. Seuss | Producer |
| Production | Chuck Jones | Producer |
| Sound | Eugene Poddany | Music |
| Art | Maurice Noble | Production Design |
| Visual Effects | Ben Washam | Animation |
| Visual Effects | Irven Spence | Animation |
| Visual Effects | Phil Roman | Animation |
| Visual Effects | Hal Ambro | Animation |
| Visual Effects | Richard Thompson | Animation |
| Visual Effects | Carl Bell | Animation |
| Visual Effects | Tom Ray | Animation |
| Visual Effects | George Nicholas | Animation |
| Art | Philip DeGuard | Background Designer |
| Art | Irv Wyner | Background Designer |
| Art | Angel Esparza | Background Designer |
| Visual Effects | Don Morgan | Layout Supervisor |
| Art | Don Foster | Graphic Designer |
