It was Kathy Bates' idea to make David (Michael C. Hall) imagine everyone in the church naked.
At Hanna's, Gilmore Girls is on the T.V.. Peter Krause, who plays Nate Fisher, was in a relationship with Lauren Graham, who plays Lorelei Gilmore.
When Claire Fisher says "Why is everything acting like I'm in the Trenchcoat mafia" is a reference to Eric Harris and Dylan Klebold, who were the perpetrators in the Columbine High School massacre of 1999, and were thought to be members of this gang for some time.
When Claire and Ruth visit Hannah's house, they all watch Gilmore Girls. On the show Gilmore Girls, Cristine Rose (Hannah) plays Christopher Hayden's (Rory's dad) mother in two episodes.
First episode that the Oscar-winning Kathy Bates directed. She would go on to direct a further four episodes, and acted in ten as Ruth's friend "Bettina".