The British publication, Radio Times, reports that “Sherlock” make-up artist Claire Pritchard-Jones spilled the news on Cumberbatch’s brief Joker-style ‘do at a recent Sherlock Holmes convention in Vienna, Austria.
How did that happen? You can blame the pressure of several roles in quick succession. When Cumberbatch showed up to work on the “Sherlock” pilot episode, he had recently bleached his hair to play Vincent Van Gogh. The “Sherlock” people tried to give Cumberbatch a darker look (to better match the literary Holmes’ physical appearance), but the dye plus the bleach resulted in a shade of green.
This was the day before filming was supposed to begin.
Fortunately, more work on the hair resulted in a more successful dye job. That’s a good thing — Sherlock Holmes is odd enough without green hair.