Hmm... for me, avoiding repeating what's already been mentioned - Legacy of Kain. All of it. Seriously. Especially scenes wherein Raziel and Kain interact directly. Michael Bell and Simon Templeman are damn good at what they do. Not so much in terms of action, but the voices, the script, the cameras, the settings - it all works pitch-perfectly. Shame the series is apparently dead really. *sadface*
Example! Linkeh because embedding I can't make work. Soul Reaver spoilers alert!
http://www.youtube.com/watch?v=Jws63E9dNN8