Warning: contains major spoilers for Inside No. 9 series 5 episode 2.

Five minutes in to Inside No. 9 episode Death Be Not Proud, a door was opened. Your reaction to who was revealed on the other side will likely have fallen into one of two categories: an electric jolt of delighted surprise, or a furrowed brow and the thought that BBC Two really needs to up its wig budget.

Those in the first category will be fans of Psychoville, Reece Shearsmith and Steve Pemberton’s 2009-2011 dark comedy thriller about a band of strange misfits bound together by a dark secret, which crossed over with Inside No. 9 this week. Those in the second category will either currently be searching out Psychoville on DVD, or still pondering that haircut.

Beneath Steve Pemberton’s wig was David Sowerbutts, serial killer obsessive and son of Maureen, with whom he shares an unnatural bond. Read more about them in our appreciation of Psychoville here.