It's a surprise-filled birthday for Buffy and the gang! Jenny's a gypsy! Oz, vampires are real! Spike's in a wheelchair! Drusilla's building a giant demon! SO MANY SURPRISES!
Amanda and Andrea talk a lot about relationships in this episode. There's a lot happening in this first half of the second two-parter of season 2 with the couples, ALL OF THEM! Oz/Willow, Spike/Dru, Cordy/Xander, Giles/Jenny and especially Buffy/Angel. It's a lot of set up, mostly so Joss can kick us in the heart in the next ep.