Is time travel possible? In movies, sure!

We’ve all wished we could go back and live moments over. Especially high school. Wouldn’t you love to go back and say the things that you should have said, either to that bully in sixth period, to your autocratic home-room teacher or that girl in study hall whom you just could never summon up enough nerve to talk to?

Well, one sub-genre of film is the time-travel adventure. I found a Web site that claims to list “The Top 15 Best Time Travel Movies,” which mentions some pretty good selections. There’s one big oversight, though: George Roy Hill’s 1972 film “Slaughterhouse-Five.”

Based on Kurt Vonnegut ‘s novel of the same name, the movie follows Billy Pilgrim, an eye doctor from Indiana who becomes “unstuck in time” and travels between World War II, his home in Indiana and the planet Tralfamadore. It’s on Tralfamadore, where Billy (Michael Sacks) lives in a glass dome with the exotic movie star Montana Wildhack (Valerie Perrine), that our hero comes to a realization about the meaning of life.

Which is, basically, that things are the way they are because … well, let’s let Vonnegut tell it: “If what Billy Pilgrim learned from the Tralfamadorians is true, that we will all live forever, no matter how dead we may sometimes seem to be, I am not overjoyed. Still — if I am going to spend eternity visiting this moment and that, I’m grateful that so many of those moments are nice.”

Below : A sequence from George Roy Hill’s film “Slaughterhouse-Five.”