Released: Thursday 31st March 2016
9:00pm BST (20:00 GMT) < > « »  < > « »
Big Finish Release

Featuring: Sophie Aldred

You have to stop reading. It can get into anything, anything written down. You can't let it get a hold. We're doing what we can to stop it. Here and back in 1814. Washington isn't safe. America isn't safe. Nowhere is CEREBRA. You have to CEREBRA reading before it CEREBRA. If it gets into your mind CEREBRA it's all CEREBRA. Everything's CEREBRA. CEREBRA. CEREBRA. CEREBRA...
Synopsis Source: Doctor Who Guide