Benedict Cumberbatch and the Sign of Four (or is it Three?)
Clip: Season 3 Episode 2 | 2m 22s
Sherlock star Benedict Cumberbatch gets some help from his friend Count Von Count to solve a brain-bending challenge from Murray-arty.
The full episode is no longer available for online streaming. Why?
Please continue to enjoy extra(s) from this episode. The full episode is still available for purchase through the "Buy Now" links.