Callan helps a former agent out of a blackmailing business.
| Name | Type | Role | |
|---|---|---|---|
| Michael Winder | Writer | ||
| Ray Smith | Guest Star | ||
| Jacqueline Maude | Guest Star | ||
| Peter Beton | Guest Star | ||
| Nicolette McKenzie | Guest Star | ||
| Mark Jay | Guest Star | ||
| Anthony Nicholls | Guest Star | ||
| Mike Vardy | Director |