Got to see this on an earlier screening =) I don't want to spoil anything so I'll just say... it's a worthy ending!

For the series overall: 1666>1978>1994 (in my opinion). As you watch the series you feel yourself getting pulled deeper and deeper into the mystery and then at the end you get pulled back up and it all comes together. The whole thing is kind of revealing of the current zeitgeist for period piece nostalgia in TV and film.