Ginger arrives, not knowing where Charles is and reveals he has been diagnosed with Alzheimer's. However, it turns out later that Charles claims it is Ginger who has Alzheimer's. Ruthie is worried about the millennium. Lucy wants to see a guy instead of doing community work, and gets rejected by her fellow Habitat for Humanity volunteers when she gets caught on her date in the pool hall. Simon and Matt hang out with disastrous results. Mary receives good news about her 30-day evaluation, then is angry when Eric won't let her date Robbie. Eric lets him come to the house and see her under their supervision, but Robbie doesn't believe their relationship will work. Matt feels depressed over Shana going to NYU, then even more when he finds out that she's living with guys in a fraternity house. Eric and Robbie talk, and Mary and Robbie get back together. Charles and Ginger see another doctor about dealing with Alzheimer's. Annie and Charles share memories from the photo album.