'Millennium', season 1, episodes 1 and 2.
First watch since broadcast and so far it holds up very well. I remember it being one of my favourite shows, but don't remember much about it. It's so damn dark and grimy, even by today's standards.
And still one of my favourite opening credits sequences.
Fun fact - back in the day, when this was broadcast down here, our local TV station played the final two episodes in reverse order