Films: Back to the Future (1985), Back to the Future Part II (1989), Back to the Future Part III (1990)
Whether Marty and Doc are going back in the past, forward into the future, or going into the future only to go back into the past so that they could fix the present, the Back to the Future films work. So often, films get bogged down in the minutiae of time travel and forget to have a good time. Any complications involving time travel in the these films serve only to propel the plot and the jokes forward, which is what makes the series great.
We'd say we miss them, but they seem to be playing somewhere on cable at every second of the day.