I know it's cliche, but the saddest movie I've seen is Titanic. Because (1) it really happened, not the exact story/characters, but the premise behind it (2) the part where the mother is reading to her small children to get them to go to sleep so they won't be afraid because she knows they're going to die gets me every time and (3) the scene with the elderly couple lying in bed together, just holding one another as the water rises up around them, is just too, too heartbreaking. I can just imagine how terrified all the people that were really aboard the Titanic must have been and how horrible it must have been to die that way.
