Sherlock returns for the 4th series. John and Mary’s baby Edmund Mary “Rosie” is born And w learn slot more about Mary’s past. Mary makes the ultimate sacrifice which causes a problem for Sherlock and John’s frendship. There is also mention of Sherinford Homes and no definite return of Moriarty yet.
The dramatic twist wasn’t as traumatic as had been suggested as it is partially well known canon from the books.
8/10