Episodes
| Episode | Title | First Broadcast | Repeated | Comments |
|---|---|---|---|---|
| 01 | Trench Warfare | 20071204 | 20071209 (R4) | Gordon Corera looks at how MI5 responded to 9/11 and how has it adapted since. |
| 02 | What We Feared | 20071211 | 20071216 (R4) | Was the service ready for the events of 7/7 and what is it doing to prevent other attacks? |