| Volume 1 | Terror in New York City | 13 |
| Atlantic inferno | 27 | |
| Sun probe | 4 | |
| Ricochet | 31 | |
| Volume 2 | Trapped in the sky | 1 |
| Operation Crashdive | 8 | |
| Pit of peril | 2 | |
| City of fire | 3 | |
| Volume 3 | The uninvited | 5 |
| The mighty atom | 6 | |
| Vault of death | 7 | |
| Move and you're dead | 9 | |
| Volume 4 | Martian invasion | 10 |
| Brink of disaster | 11 | |
| The perils of Penelope | 12 | |
| End of the road | 14 | |
| Volume 5 | Day of disaster | 15 |
| Edge of impact | 16 | |
| Desperate intruder | 17 | |
| 30 Minutes after noon | 18 | |
| Volume 6 | The imposters | 19 |
| The man from MI5 | 20 | |
| Cry wolf | 21 | |
| Danger at ocean deep | 22 | |
| Volume 7 | The duchess assignment | 23 |
| Attack of the alligators | 24 | |
| Cham Cham | 25 | |
| Security hazard | 26 | |
| Volume 8 | Path of destruction | 28 |
| Alias Mr. Hackenbacker | 29 | |
| Lord Parker's 'oliday | 30 | |
| Give or take a million | 32 |