| Episode credited cast: |
 | Raviv Ullman | - | Phil Diffy (as Ricky Ullman) |
 | Amy Bruckner | - | Pim Diffy |
 | Craig Anton | - | Lloyd Diffy |
 | Lise Simms | - | Barbara Diffy |
 | Aly Michalka | - | Keely Teslow (as Alyson Michalka) |
| Rest of cast listed alphabetically: |
 | Shane Baumel | - | Phil - Age 5 (voice) |
 | Joel Brooks | - | Joel Messerschmidt / Battina Messerschmidt |
 | Jack Carter | - | Older Nathan (voice) |
 | Josh Flitter | - | Nathan |
 | Estelle Harris | - | Older Pim (voice) |
 | Spencer Locke | - | Candida Keegel |
 | June Renee Santiano | - | Volcano Buyer |
 | Brandon Mychal Smith | - | Lil Danny Dawkins (as Brandon Smith) |
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