A promotional still from the new episode of Sherlock caused a bit of a stir – when it was released minus a shoulder.

A shot of Benedict Cumberbatch and Martin Freeman posing together in period costume was unveiled by BBC1 to promote the new special.

But when fans noticed that Benedict, who recently got engaged, was missing a shoulder, some speculated whether this was a clue to the plot.

Benedict Cumberbatch and his fiancee
Benedict Cumberbatch recently got engaged (PA)

And even the series co-creator Mark Gatiss joined in, writing: “Based on the lost story the adventure of the missing shoulder.”

But the BBC eventually updated the pic, simply putting the shoulder back in.