Music critic Alex Ross has great profile of composer Michael Giacchino in this week's New Yorker (gated, unfortunately). Giacchino is best known for his integral work for the television series Lost, but he is also responsible for some incredible film scores, most notably the Oscar-winning score for Up.
Below are a couple of examples of Giacchino's talent. The first is the "Married Life" movement from Up, which is both charming and heartbreaking. The second is a video from Ross' New Yorker blog, which shows how Giacchino's music heightens the mystery and suspense of Lost.