Dexter

What can I say about Dexter that doesn't spoil the show for others?

It will catch you.

Most people I know were caught by the first season. It was late in the second season when I became intrigued, and I fell in love with the character study in season three (not to mention Jimmy Smits).

The fourth season is generally considered the best, the most surprising at the very least. The fifth season is another good character study. It really pushes Dexter to his limits.

Dexter will catch you. It's just a matter of when.