Interstitial Space

The Interstitial Space, also known the the Time-Space Man's world or the In-Between, is a layer of reality between the Surface and the Otherside proper. Travel between the Surface and Otherside always passes through the Interstitial Space, although the time spent there, and the aspect seen, vary by method. It mainly appears as a disturbing mirror of the Surface, though it also has appeared as an amusement park, a town for cats, and strange floors of a building. The Interstitial Space has few permanent residents, such as the Elevator Girl, the Skittering Creature, and the Mantis Woman.