This was a very promising start to the series this felt like NBC Sherlock series in fact even through characters are similar there one difference as you can see in description he's immortal. I really hope they avoid love thing with these characters because that would be better.
It was good set up Henry knows he's not alone and trying to figure out who is trying kill him is bound make his life more complicated.
I don't know how he will hide his secret from her but it should be interesting