Can't recall if it was a miniseries or simply cancelled, but the plot point I remember was Sherlock was cryogenically frozen back in the 1800, having been a real-life detective that Doyle immortalized in novels. I think it was voluntary after having contracted the Bubonic Plague somehow.
He's revived and cured in the 1980's, and then somehow links up with Watson's last descendant, a female American detective if I remember correctly.
Mostly a mystery but with some light moments around culture shock, such as his reaction to London Bridge having been moved to Arizona.