If a show is about characters who can see spirits or ghosts, the show can only stay interesting if they come in contact with them about Once an Episode. Now, one would think that, because usually even normal humans can sense these creatures a little ("Did anyone else get cold just now?" if nothing else), they wouldn't be all that common, or someone would have seen through the Weirdness Censor by now ("Why is it always so cold?"). Yet somehow, unfailingly, there these spirits are, every single week. Examples of Magnetic Medium include: