S2E3: Chapter 3: I Know Where I'm Going featuring the minisode The Resurrectionists

Heaven sends the angel Muriel in disguise to spy on Aziraphale and Crowley. Aziraphale drives to Edinburgh in pursuit of his Clue, and learns a little about a lot. The couple's visit to Edinburgh in 1827 involves graverobbery, a statue and an unfortunate encounter with a vial of laudanum. In the present, Crowley is in charge of the bookshop, and is disappointed by human beings and the weather.