Welsh poet Ifor Ap Glyn has a passionate interest in the toilet: its history and how it has evolved over the centuries, right up to the development of the current design. Here, he explains the reasons behind his fascination.
| Directing | Nick Watts | Director |
| Crew | Ifor Ap Glyn | Presenter |
| Production | Ifor Ap Glyn | Producer |
| Production | Alexandra Gliddon | Producer's Assistant |
| Production | Eric Harwood | Executive Producer |
| Production | Mali Parry-Jones | Producer's Assistant |
| Production | Clare Paterson | Executive Producer |
| Production | Nick Watts | Producer |
| Crew | Nick Watts | Cinematography |
| Editing | James Marshall | Editor |
| Production | Danica Marshall | Production Manager |
| Crew | Ieuan Clwyd Davies | Mixing Engineer |
| Sound | Huw Erddyn | Sound |
| Sound | Angus Johnstone | Sound |
| Camera | Aled Jenkins | Additional Camera |
| Editing | Owain Llwyd | Editor |
| Production | Yoko Ishitani | Location Manager |
| Production | Alfredo Moroni | Location Manager |
| Production | Li Qiao | Location Manager |
| Production | Marian Griffith | Production Assistant |
| Production | Bethan Griffiths | Production Assistant |
| Production | Rhianydd Newbery | Production Assistant |
| Production | Richard Williams | Production Assistant |
| Production | Siaron James | Researcher |
| Production | Clare Jones | Researcher |
| Editing | Hiro Matsui | Archival Footage Research |