That was in Richard Linklater's third film, the cult hit Before Sunrise. Now, in Before Sunset, which had its world premiere in Berlin yesterday, the director and his two stars and co-writers, Ethan Hawke and Julie Delpy, return to the characters. They have missed the date with destiny, but Jesse, a novelist, is in Paris for a book signing, Celine comes to see him and they meet again for the first time.