They climb, squeeze through crevices, bite through lead pipes and conquer their environment again and again. A scientific journey of discovery into the world of rats.
| Actor | Role |
|---|---|
 David SuzukiNarrator | Narrator |
| DDr. Kaylee ByersSelf | Self |
| DDr. Kelly LambertSelf | Self |
| DDr. Dani DumitriuSelf | Self |
| JJonothon LyonsSelf | Self |