Think this series could be summed up in one of my friend's stating that Moffatt is obsessed with everyone being related, I'm a little surprised Moriaty wasn't a second cousin in the end, and my mum asking where the high functioning sociopath had gone.
The ongoing drama coming from Mary's past seemed to dominate the last 3 years (a downside of them being so spread apart) and I'm a little disappointed that she had the final monologue. Was it part of Martin Freeman's contract that she had to stick around? I did manage to enjoy the second and third episodes, though not as much as previous series.