Psychic Realm
From Tardis Wiki, the free Doctor Who reference
The Psychic Realm was referred to by Floater as the realm of "thoughts and ideas" and by Madame Vastra as "the transitory spaces betwixt dimensions". It was the home to Floater and the rest of his unnamed species. It is also where the victims of the Psychic Virus were imprisoned after it infected the Thirteenth Doctor, as it could affect anyone who had any knowledge of her. Floater stated humans could not survive in the Psychic Realm for long.
