I was watching a rerun of that 'kid on drugs kills schoolmates' SVU episode on USA, and a commercial for 'Murder at the Presidio' comes on. I'm watching it and catch a glimpse of a guy who looks way freaking familiar, but I can't figure out why! So I go on IMDB and look up the movie, and start going through all the male actors listed, until finally... Martin Cummins!
Aka, Ames White from Dark Angel! I hit myself upside the head with a loud 'DUH!'