UNCLE Agent Napoleon Solo is in London with April where they are to pick up instructions in the form of a half-penny in a beggar's cap. Unfortunately, Solo was followed from the airport by Mother Muffin, an elderly lady who leads a group of assassins bent on retrieving the half-penny first.
| Name | Type | Role | |
|---|---|---|---|
| Joseph Calvelli | Writer | ||
| Arthur Malet | Guest Star | ||
| Bruce Gordon | Guest Star | ||
| Boris Karloff | Guest Star | ||
| Bernard Fox | Guest Star | ||
| Charles Dierkop | Guest Star | ||
| Robert Vaughn | Guest Star | ||
| William Tuttle | Guest Star | ||
| Richard Peel | Guest Star | ||
| Mitzie Evans | Guest Star | ||
| Mary Esther Denver | Guest Star | ||
| Sherman Marks | Director |