Daffy Fernald loses her brother's toy rocket when it flies into a storm drain. She knows Alvin will be upset if he finds out, so she climbs into the dark tunnel to search for it. She spots a stranger, Ernie Nelson, and sees that he's carying a gun. She races home and tells Alvin, but the would-be inventor refuses to believe her.
| Actor | Role |
|---|---|
 Eric SheaNot listed | Not listed |
 Clay O'BrienNot listed | Not listed |
 Richard BakalyanNot listed | Not listed |
 Jaclyn SmithCathy Martin | Cathy Martin |
 John ColicosMoroni | Moroni |
 Milton FromeCarnival Barker | Carnival Barker |
 Ted GehringOfficer Jim Moody | Officer Jim Moody |
 Jack KruschenAbner Denby | Abner Denby |
 John LuptonMr. Fernald | Mr. Fernald |
 Ronnie SchellDeputy Scruff | Deputy Scruff |
 Hal SmithCarnival Barker | Carnival Barker |
 Ed McCreadyCarnival Barker | Carnival Barker |
 Richard O'BrienNot listed | Not listed |
| TTed ChristyCarnival Goer (uncredited) | Carnival Goer (uncredited) |
 Chester HayesStiltwalker (uncredited) | Stiltwalker (uncredited) |
 Kim RichardsDaphne 'Daffy' Fernald | Daphne 'Daffy' Fernald |