we can’t resist asking him what everyone wants to know: following his recent statement that Moriarty is “dead, dead, dead… but nothing is impossible” – have we really seen the last of him in Sherlock?

Andrew’s voice raises an octave and there’s a sudden hint of Moriarty menace.
“Ah, see, you got it in at the end there!” he laughs. “There’s a new series filming in 2013…”