The Plot Box is a mysterious, unknown place where characters (usually minorities) are banished to when the writers decide they no longer know what to do with (or want to deal with) them. These characters disappear, often with little explanation, and are absent from the screen/page until the writers decide to use them again and they just reappear as if nothing happened.
We talk a lot about the Plot Box on Fangs because this is a storytelling tool that is very commonly used, can appear in many different ways and very often serves as another means by which marginalised characters are erased or tokenised.
The most common form of Plot Box Banishment is the simple disappearance. Usually with no explanation - a character will just not be present for several episodes. I’d like to think that they’re having wonderful wild times with the Doctor and he just got the timing wrong - but Doctor Who isn’t that diverse either.
The Originals has one gay character and he spends the majority of his time in the plot box. Josh is besties with Davina. When he lost his boyfriend Aidan, Josh went away to lick his wounds and everybody including Davina who supposedly cares so much about him promptly forgot that he exists. Josh is allowed out of the plot box only when Davina is in some kind of danger or her fee fees are hurt. He has no real story of his own and the epitome of the GBFF, there to provide service and comfort for his straight “friend” (so often our shows seem to confuse “servitude” with “friendship”)
ABC made a big deal about adding Mulan to the cast of Once Upon a Time. And a while Once Upon A Time was teasing the idea that Mulan would confess her love to Aurora giving the series its first (and only) LGBT character. When Aurora announces her pregnancy, Mulan congratulates her and never reveals her feelings. Mulan then deals with her disappointment by joining the Merry Men and disappearing into the Plot Box - when the Merry Men return, Mulan is conspicuous by her absence. Though I say conspicuous, absolutely no-one noticed: her being lost in the Plot Box was not worthy of comment. Just when,. as an audience we were thinking of starting a missing person’s report Mulan shows up to help Merida to deal with a problem, before promptly leaping back into the Plot Box again.
Morgan on The Walking Dead is perhaps my personal favorite example of this particular form of banishment. We first meet Morgan and his son Duane in season one, when Rick stumbles upon them after waking up in the hospital alone. Morgan explains to Rick how society fell apart and gives him rudimentary instructions of how to survive in a zombie apocalypse.

