Benedict Cumberbatch delivering the same line as two different characters.
Once you rule out the impossible, whatever remains, however improbable, must be true.
Miss Marple Martin Crieff
But the thing is, we’ve taken away all the things that can possibly have happened, so I suppose the only thing that’s left, even though it seems really weird, must be the thing that did happen, in fact.
….and no WAY would John Finnemore have done that because Ben came to record the second series AFTER Sherlock series one :)