1. A Case for the Bishop

Unwin and Matthew are put on the case when the Ambassador of Dreisenberg attempts to smuggle a stolen mini-computer out of the country.

2. A Question of Miracles

Unwin and Matthew are sent to investigate the sabotage of several desalination plants with the help of Agent Blake.

3. To Catch a Spy

Unwin and Matthew are on the case when enemy spy George Grey escapes from a maximum security prison and disappears over the estate of Sir Humphrey Barton.

4. The Feathered Spies

Unwin and Matthew are sent to plug a security leak for a top-secret project.

5. Last Train to Bufflers Halt

Unwin is assigned to accompany a bullion train after an attempted robbery.

6. Hole in One

Unwin and Matthew are puzzled when they're assigned to investigate a security leak regarding an early warning satellite.

7. Recall to Service

Unwin must pose as an army officer in order to prevent the sabotage of an experimental new tank.

8. Errand of Mercy

When Unwin takes to bed from sunstroke, he has an extraordinary dream. Can he and Matthew survive their dangerous journey in Gabriel, the flying car, and deliver medical supplies to plague-ridden Africa?

9. The Deadly Whisper

Unwin encounters trouble in his parish when a local scientist is held hostage and forced to complete work on a prototype ultrasonic rifle so that mercenaries can shoot down a new jet.

10. The Cure

Unwin visits a health farm in order to keep tabs on one of the residents, a notorious spy named Sakov, and is baffled when Sakov manages to engineer the crash of a test car whilst secured in a treatment room.

11. School for Spies

Unwin infiltrates a gang of saboteurs posing as priests, but will he be discovered before he reveals their nefarious schemes?

12. Mayday! Mayday!

Unwin is assigned to protect the King of Muldovia from his brother's assassination attempts. When the flight crew of their plane is incapacitated, Unwin ends up having to pilot the plane himself!