Episodes
| Episode | First Broadcast | Repeated | Comments |
|---|---|---|---|
| 01 | 20051210 | 20071203 (R4) | Michael Portillo hunts down nature's tyrants and meets the animals who make it to the top. Michael Portillo investigates nature's tyrants |
| 02 | 20051217 | 20071210 (R4) | Are animals only ever in it for themselves? Michael Portillo investigates. Michael Portillo investigates nature's tyrants |