The daughter of a British Government engineer who is working on a defence protect is kidnapped, and the only way she will be safely returned is if he agrees to betray secrets to enemy agents.
| Name | Type | Role | |
|---|---|---|---|
| John Kruse | Writer | ||
| Kate Dorning | Guest Star | ||
| John Joyce | Guest Star | ||
| Michael Craig | Guest Star | ||
| Ian Redford | Guest Star | ||
| Gennie Nevinson | Guest Star | ||
| Oona Kirsch | Guest Star | ||
| Becci Hunt | Guest Star | ||
| Hilary Crane | Guest Star | ||
| Jennifer Granville | Guest Star | ||
| Sue Nicholls | Guest Star | ||
| John Michael McCarthy | Guest Star | ||
| Alun Lewis | Guest Star | ||
| Nigel Humphreys | Guest Star | ||
| Stewart Harwood | Guest Star | ||
| Christopher Saul | Guest Star | ||
| Lynda La Plante | Guest Star | ||
| Patricia Marks | Guest Star | ||
| Alan Igbon | Guest Star | ||
| Ronald Hines | Guest Star | ||
| Sean Chapman | Guest Star | ||
| Charles Pemberton | Guest Star | ||
| Martin Campbell | Director |