| Episode credited cast: |
 | Sarah Lancashire | - | Herself - Narrator (voice) |
| Rest of cast listed alphabetically: |
 | Mark Cleave | - | Himself - Senior Keeper |
| Karen Homer | - | Herself - Senior Vet Nurse |
| Darren Langford | - | Himself - Senior Keeper, Birds |
| Chas Mackenzie | - | Himself - Head Keeper, Rhinos |
| Helen Massey | - | Herself - Senior Keeper |
| Wayne McLeod | - | Himself - Head Keeper, Birds |
| Rob Pettitt | - | Himself - Orthopaedic Surgeon |
| Clare Rafe | - | Herself - Keeper |
| Tim Rowlands | - | Himself - Head Keeper |
| Steve Unwin | - | Himself - Vet |
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