The last 15 minutes and 41 seconds of the last episode should not have existed. The rest of the show was perfect but that last quarter of an hour was pointless and retroactively ruined many powerful moments from the rest of the show. I advise that anyone who watches Hellsing does not watch these 15 minutes. I should note that this may have annoyed me a lot more than other people who have watched the show as it directly went against many of the things I liked about the show so much. I also loved every single moment of Hellsing, outside of this particular section so I was particularly disappointed and annoyed that it tarnished my experience (which is why I'm going it doesn't exist).

So before I proceed to erase those last few moments from my memory, I shall try to explain the main reasons this last quarter of an hour is the bane of my existence.

1. Spoiler, click to view

   Bringing back Alucard is stupid. What was the point of doing this? His death was perfectly executed and one of the best moments of the show but the fact that he comes back 20 minutes later takes away so much from the scene in which he 'closes his eyes' and the emotional weight of it is completely diminished.

1. Spoiler, click to view

   This leads on to the second point; if the show is all about The Major's plan to kill Alucard and the execution of that plan (which it seems to be from the fact that everything that happens is due to the Major wanting to put Alucard in a position were he has no choice but to absorb Schrodinger, making him 'nowhere'), then having all that build-up be undone with some weird 'Alucard just killed all the other copies bro cause he's Alucard' undermines everything that happened till that point. At least in relation to the main plotline, maybe not some side-line stuff.

I don't have much to say on the positives because I loved everything else about the show. The conflict, story, humour, relationships, characters and fight scenes were all just so well written and executed. Some characters and their arcs were done perfectly, nothing could have been done to make them better. The first ones that come to mind are Bernadotte, Anderson, Alucard (if it weren't for those last 15min) and The Major.

Now I can pretend the last bit of this never happened and give it the 100 it deserves for everything else that happened.
I highly recommend Hellsing Ultimate but I strongly advise not watching the last 15 minutes and 41 seconds.