A dissatisfied THRUSH collaborator tips U.N.C.L.E. off to a new deadly hiccup gas. A pendant he wears leads Illya to Greenwich Village and an art gallery run by Mark Ole, a THRUSH agent. Starving artist Sylvia Harrison joins Illya, who is nearly suffocated at the hands of a foam producing machine.
| Name | Type | Role | |
|---|---|---|---|
| Al Ramrus | Writer | ||
| John Herman Shaner | Writer | ||
| Charles Lane | Guest Star | ||
| Fred Villani | Guest Star | ||
| Stanley Ralph Ross | Guest Star | ||
| Lynn Carey | Guest Star | ||
| Sherry Alberoni | Guest Star | ||
| Sabrina Scharf | Guest Star | ||
| Robert H. Harris | Guest Star | ||
| Sharyn Hillyer | Guest Star | ||
| Nellie Burt | Guest Star | ||
| Jack Perkins | Guest Star | ||
| Tommy Farrell | Guest Star | ||
| George Waggner | Director |