In Doctor Who Series 4 The Stolen Earth, Ianto in Torchwood has the same striped mug that Benedict and Martin both have in that picture from the set of Sherlock.
Boom. Connected Doctor Who, Torchwood, and Sherlock. I nearly fell over when I saw the mug.
Heh heh. Not really but still, I love the Sherlock/DW/Torchwood fandom.