In this 1993 episode of this Star Trek spinoff series, the holodeck generates not only a believable approximation of the world of Sherlock Holmes, but a dangerously realistic version of the legendary detective’s arch-nemesis, Moriarty (portrayed by Daniel Davis, who, improbably, played Niles the stuffy butler on The Nanny). Why point out this vintage episode for special mention? Because the current, brilliant version of Sherlock is created by the same writers who, in the science fiction realm, are behind the current, equally brilliant incarnation of Doctor Who. So any direct connection between Holmes and holodecks is worth at least a peek.