Hey! Well the new series (Series 3) is supposed to be starting up in the new year.
But as part of the run-up to it, they are going to rerun Series 1 and Series 2, starting at 12:30 am Halloween night (technically Nov 1 by then).
Not sure if we're going to stay up that late to watch it, but I'd imagine they'll surely be on I-Player for a bit after each episode airs this time around.
So, if you missed some or all of it the first time around, now's your chance!