Callan is assigned to disrupt a romance between a government worker and a suspected spy. Reluctantly he delves into his bag of dirty tricks.
| Name | Type | Role | |
|---|---|---|---|
| Williams Emms | Writer | ||
| Stephanie Beacham | Guest Star | ||
| Oliver Cotton | Guest Star | ||
| Clyde Pollitt | Guest Star | ||
| Edward Harvey | Guest Star | ||
| Michael Jayston | Guest Star | ||
| Rachel Herbert | Guest Star | ||
| John Quarmby | Guest Star | ||
| Peter Duguid | Director |