The story follows a young girl named Julie and her eccentric, goofy scientist grandfather on zany adventures across the high seas.
| Actor | Role |
|---|---|
 Hynden WalchJulie | Julie |
 Dustin HoffmanGrampa | Grampa |
| DDavid EcclesSteven | Steven |
 Fred StollerPirates | Pirates |
 Dee Bradley BakerPirates | Pirates |
 Keith FergusonCaptain | Captain |