I was getting a bit worried at the beginning of the episode, that they'll have Mick in a human state for a good portion of the season, and go away from the cases etc. and start focusing too much in the drama and relationship of the two. But the episode certainly didn't dissapoint, it had a ton of good ation. The only part I did't enjoy was the homo-erotic scene, but it a decent price to pay for seeing him back as a vamp. Joseph looked really cool in the vampire makeup... they should have him fight more.

As for the mixing of the blood, I was wondering the same thing as you. My bet is that he either still has the noble blood or a mix of it that will allow for some wierd mutation. I don't think the show would destroy his noble blood like that, I thought it was an interesting thing to bring up. Else, they shouldn't have brought it up. The other side of it, that maybe Joseph comes from a strong line of vampires himself so this blood will do Mick good. The other thing is that maybe Mick having noble blood could make him weaker against his noble blood elders, so this new blood could give him a chance of fighting against them or something. I don't know, many things could happen.