This website has synopses for all of the Gilmore Girls episodes, so you guys can get caught up with the show before SY goes on:
http://www.televisionwithoutpity.com/show.cgi?show=25
Also, I suggest looking at the 7th Heaven episode synopses - you won't regret it:
http://www.televisionwithoutpity.com/show.cgi?show=8