Every series of Inside No. 9 appears to have an episode set in suburbia. This time around, the family living at No. 9 sees one of its residents going slowly insane. David (Reece Shearsmith) is a househusband who while out jogging one morning comes across an a single abandoned black shoe in the street near his house. David tries to find the rightful owner of the shoe, but soon he become totally obsessed with it, to the frustration of his wife Louise (Keeley Hawes). Shearsmith\u2019s co-writer Steve Pemberton appears tonight, along with Horrible Histories and The Wrong Mans star Mathew Baynton, and there is a guest appears from Danny Baker. Inside No. 9 is on BBC Two at 22.00.