It will be interesting to see what media analysts years from now make of television in the 2010s. The small screen has been so dominated by lush period pieces (The Tudors, The Borgias, Mad Men), procedurals driven by brilliant social misfits (House, Dexter, Bones), and supernatural dramas (The Vampire Diaries, The Walking Dead, True Blood), one wonders at the odd mix of nostalgia, monster mania and obsession with mad genius that lurks in Americans’ collective unconscious. For British programmers, these are very familiar waters, and US viewers are finding some UK offerings to be just their cup of tea.