Director Alfonso Cuarón takes fans on a journey unlike anything they've ever seen before in the upcoming thriller Gravity, arriving in theaters October 4. Sandra Bullock and George Clooney star as two astronauts floating through outer space after a space shuttle explosion. When their oxygen begins to run out, its doubtful they'll both find a way home. Check out over 20 new photos featuring the two stars as they suffer the isolation and loneliness of space.