In an attempt to cure Barney's hiccups, Fred offers his friend a swig from an experimental soft drink he has formulated. The brew turns Barney invisible, and Fred's elaborate attempts to hide the fact make Wilma wonder about her husband's sanity.
| Name | Type | Role | |
|---|---|---|---|
| Warren Foster | Writer | ||
| John Stephenson | Guest Star | ||
| Hal Smith | Guest Star | ||
| Howard McNear | Guest Star | ||
| Mel Blanc | Guest Star | ||
| William Hanna | Director | ||
| Joseph Barbera | Director |