For a show renown for its middle episode slump, tonight's instalment skewered the trend through the belt, and set a new bar for hilarity. It may have taken the collective might of Gatiss, Moffat and Thompson to pull off this minor miracle, but after two years away, what better way of reacquainting us with our favourite high-functioning sociopath than with a wedding, some wacky character interplay, and a cameo from Lara Pulver?
