Disguised as a music teacher, Drake infiltrates a Chinese spy ring in Hong Kong.
| Name | Type | Role | |
|---|---|---|---|
| David Stone | Writer | ||
| Ralph Smart | Writer | ||
| Mike Pratt | Guest Star | ||
| Norma West | Guest Star | ||
| Paulet Tu | Guest Star | ||
| Yvonne Furneaux | Guest Star | ||
| Peter Arne | Guest Star | ||
| Anthony Dawson | Guest Star | ||
| Geoffrey Bayldon | Guest Star | ||
| Burt Kwouk | Guest Star | ||
| Dennis Ramsden | Guest Star | ||
| Charles Carson | Guest Star | ||
| Don Chaffey | Director |