You can buy the hybrid alien who looks just like a human with pointy ears, but him being descended from a consulting detective living in 1890s London is where your suspension of disbelief breaks down?![]()
I toyed with the idea that the Sherlock Holmes canon was actual history in Star Trek. It's sort of a fun idea to be reading those stories in the knowledge that Vulcans and so forth are out there currently ignoring his exploits. But then we have Data being a fan of the novels and multiple episodes where it's pretty explicit that Holmes was fictional.
So that's where my suspension of disbelief breaks down.
--Alex