What a disappointment, the scriptwriters have turned him into a parody of himself with added, out of character, cynicism and downright cruelty.
To re-appear as a waiter with a mascara moustache at the table of your dearest friend in the middle of a restaurant, who has been mourning your death for two years, and later to pretend you were both about to die in an underground explosion, tell him you couldn't disarm the device, and wait for the last seconds to do so, has nothing to do with the former Sherlock, who was eccentric, but not cruel. All this, plus manic editing, (hardly any take being on screen for more than 3 seconds), very annoying, and I won't bother watching the next episodes, another BBC balls-up!