- Zaphod Beeblebrox as Calvin
- Dolphin 1 as Hobbes
- Dolphin 4 as Susie
- Dolphin 3 as Calvin's Mom
- Questular Rontok as Calvin's Dad
- Trillian as Rosalyn
- Gretchen (from Recess) as Calvin's Teacher
- Arthur Dent as Calvin's Principal
- Ford Perfect as Charlie
- Dolphin 2 as Calvin's Dummy
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