Sherlock stars Benedict Cumberbatch and Martin Freeman still can't quite believe how popular the BBC drama has been.
With the second series about to hit our screens, the pair - who play detective Sherlock Holmes and his faithful sidekick Watson - are still reeling from the success of the first which, thanks to modern technology, was pretty much instantaneous.
When the first episode, A Study In Pink, aired last July, Benedict remembers sitting with creators Mark Gatiss and Steven Moffat, plus Moffat's wife and producer Sue Vertue, in the Moffats' garden.
"All the twittery stuff started to happen," he said. "We were trending, which is apparently brilliant, and by the end of it I thought there would be people abseiling into the garden just to have a peek at us because this thing had exploded that night. It was thrilling.
"There was an amazing feeling of love for it. Of course, it had its detractors and it would be weird if it didn't, but the feeling was one of great goodwill."
The series went on to be nominated for seven TV Baftas, winning three for best series, editing and best supporting actor for Martin ("It was just a very nice cherry," he said modestly), while Benedict now has a whole army of online fans.
It's also gone global, winning Emmy nominations and two very high-profile fans in directors Steven Spielberg, who cast Benedict in his film version of War Horse, and Peter Jackson, who shifted filming on The Hobbit in New Zealand so that Martin could make more Sherlock.
"He said, 'We want this to work', so he put the film in chunks so that I could do this," Martin revealed.