| Episode credited cast: |
 | Hank Green | - | Himself |
| Rest of cast listed alphabetically: |
 | Michael Aranda | - | Himself (archive footage) |
 | Craig Benzine | - | Himself (archive footage) |
| Jessi Knudsen Castañeda | - | Herself (archive footage) |
 | Felicia Day | - | Herself (archive footage) |
| Emily Graslie | - | Herself (archive footage) |
| Henry Green | - | Himself (archive footage) |
 | John Green | - | Himself (archive footage) |
 | Hannah Hart | - | Herself (archive footage) |
 | Grace Helbig | - | Herself (archive footage) |
| Caitlin Hofmeister | - | Herself (archive footage) |
 | Olga Kay | - | Herself (archive footage) |
 | Rhett McLaughlin | - | Himself (archive footage) |
 | Link Neal | - | Himself (archive footage) |
| Henry Reich | - | Himself (archive footage) |
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