OK I need help with this one movie that was on TV the other day that I didn't catch the title to. It is an older movie with john travolita and oliva newton john where zack, john travolita, robs a bank that oliva newton works at. And god is going to flood the world or something or other unless they make a sacrfice for each other. Please help!!

Here it is:
Two of a Kind (1983) (http://imdb.com/title/tt0086494/)