Callan must retrieve a microfilm from a spying medium.
| Name | Type | Role | |
|---|---|---|---|
| James Mitchell | Writer | ||
| Betty Marsden | Guest Star | ||
| Avril Elgar | Guest Star | ||
| Allen Cullen | Guest Star | ||
| Bruce Purchase | Guest Star | ||
| Wensley Pithey | Guest Star | ||
| John Barrard | Guest Star | ||
| Piers Haggard | Director |