| Presidents of the Zoological Society | Lord Godmanchester; his wife, Lady Godmanchester. Later, Lord Oresby. Later, Mr Harmer. Then again, Lord Oresby. |
|
| A Vice-President | Professor Hales. | |
| Director of the Zoological Gardens | Dr Leacock; his wife, Madge Leacock; their daughter, Harriet Leacock. | |
| Secretary of the Zoological Gardens | Simon Carter, the Narrator; his wife, Martha; their small children, Reggie, Violet. | |
| Staff of the Secretary’s Office | Mrs Purrett; Rackham, a messenger. |
|
| Curator of Mammals | Sir Robert Falcon; his wife, Jane. | |
| Keepers of Mammals | Strawson (head keeper); Barley; Young Filson. |
|
| Curator of Birds | Matthew Price; his sister, Diana Price. | |
| Head Keeper of Birds | Old Filson; his wife. | |
| Curator of the Insect House | Mr Sanderson; his retired housekeepers, Mrs Blessington, Miss Delaney. | |
| Curator of Reptiles | Dr Emile Englander; his wife, Sophie. | |
| Prosector and Veterinary Surgeon | Dr Charles Langley-Beard; his family. | |
| Curator of the Aquarium | Dr Harry Jackley. | |
| Research Workers | Dr Pattie Henderson; Dr Newton; Dr Nutting. |
|
| Mr Blanchard-White | A Uni-European, interested in Zoo policy. |