What I like about the first episode, of this new series, is that it still keeps you guessing about the last scene, in the last series, in which Sherlock appeared to fling himself off the roof of Bart's Hospital and die on the pavement. Obviously, Sherlock survived this fall - but how? Two possible scenarios were presented in the programme - both of which may have been fictional. But there was a suggestion, in the script, that there are 13 possibilities!! Now I didn't see that coming!