In the sixth Josh Kirby adventure, typical American teenager Josh Kirby (Corbin Allred) is once again thrust from the 20th century into the future, where he finds himself trying to save Earth from total destruction as he comes into contact with a race of mushroom people.
| Actor | Role |
|---|---|
 Corbin AllredJosh Kirby | Josh Kirby |
| JJennifer BurnsAzabeth Siege | Azabeth Siege |
 Derek WebsterZoetrope | Zoetrope |
 Barrie InghamIrwin 1138 | Irwin 1138 |
 Jonathan C. KaplanIrwin Lee (as Jonathan Charles Kaplan) | Irwin Lee (as Jonathan Charles Kaplan) |
 Michael C. MahonDonald Kirby (as Michael Mahon) | Donald Kirby (as Michael Mahon) |
| SStacy SullivanMrs. Kirby | Mrs. Kirby |
 Helen SiffMrs. Mandelbaum | Mrs. Mandelbaum |
 Charisma CarpenterBeth Sullivan | Beth Sullivan |
 Johnny GreenDuke Dunkington | Duke Dunkington |
 Steve BlumPrism (voice) (as David Lucas) | Prism (voice) (as David Lucas) |