Sophie starts out thinking she's identified a new kind of grudge. She has, but it's not what she thinks. In fact, the true subject of this episode is the Boundary Mockery Grudge. Luckily, Nic is on hand to help clarify things, and some exciting new discoveries are made in the field of Grudge Studies.

You can follow Nic on Twitter @NicAubury or visit his website www.nicaubury.com.

For more info about Sophie and her projects please visit www.sophiehannah.com