5) The Title Sequence

The opening sequence to the show with its clockwork cities and kingdoms is a stroke of pure genius and has been justly rewarded. There's also the rousing music which will, on April 17th, send shivers down the spines of eagerly awaiting fans. In addition to the levels of detail which ensure it's an enjoyable part of the show and not something - quite the novelty - you want to TiVo through!