She's English, which accounts for the steely reserve. She's a former model, which explains the perfect posture and self-possession. She has a singular inspirational beauty of face, which makes for affecting, prolonged, full-screen close-ups. And she comes packaged in a smoking, lithe, long, and lean athletic body, but that still doesn't explain the miracle of Natascha McElhone's forever-lasting (don't forget to PAUSE, REWIND...