It's the little things really.
I just realized, as I sat watching the Heroes episode that I taped, that Dr. Who is playing one of the Heroes! Christopher Eccleston is playing Claude the "invisible man" hero. I wonder if the name Claude is an homage to Claude Rains, the original Invisible Man. I'll bet it is.
I didn't recognize Mr. Eccleston at first. It was his voice that gave him away.
I love that show.