[quote=@follycle]
Hiya.

So, do I need to have seen the show to get into this or will reading through a few wiki pages fill me in enough? I'm not against watching the series if I have to (though I know there's like 3 seasons and 3 different versions of the show).
[/quote]

I think for the purposes of this game, the first arc or two of Index should give a decent foundation on the general world you'd be working with, if a little more focused on the magic as opposed to science side. It helps a lot with the setting rules. Of course, taking in as much as you can is preferable for familiarity, and you've still got some time.