The cause of the bizarre "fairy circles" that are found across the grasslands of Namibia may have been discovered by ...

A typical fairy circle on the Kamberg, which the researchers investigated during the 2024 rainy season: The clumps of grass – up to 80 cm high – can be seen at the edge of the fairy circle.

The Doctor stepped into the fairy circle right at the start of the episode. This was a huge disrespect to the fairies, and it led to him disappearing and Ruby was left alone all episode.