I always like to think of the TARDIS' perception filter as a type of SEP Field :) https://tardis.fandom.com/wiki/Perception_filter https://tardis.fandom.com/wi

I always like to think of the TARDIS' perception filter as a type of SEP Field :) https://tardis.fandom.com/wiki/Perception_filter https://tardis.fandom.com/wiki/Perception_filter Adams also wrote for Doctor Who: https://en.wikipedia.org/wiki/Douglas_Adams#Doctor_Who https://en.wikipedia.org/wiki/Douglas_Adams#Doctor_Who