Origianl
http://us.imdb.com/Title?0090142
Sequel
http://us.imdb.com/Title?0094118
I didn't even know there was a sequel before I did a search on imdb, but it got a few good comments so....
The original one is a classic though. Look how young Michael J. Fox looked back then... hey, wait a minute: That's exactly how young he looks now!!!