Old Navy's 1990s TV flashback advertising continues, moving on from the stars of Blossom to the dreamboat king of Beverly Hills, 90210. This time,Jason Priestly's been cast as an elementary school teacher alongside former castmate Gabrielle Carteris. The spot features some classic Crispin Porter + Bogusky quirk, such as the random robotics in Priestly's classroom and the bizarrely complex brass instrument being played by the young girl who seems to have a Cassandra-esque curse that keeps anyone from listening to her. So which '90s celeb will be dragged from the vault next? Claire Danes? Noah Wyle? The entire cast of Twin Peaks?