Judy Greer, who makes her debut here as Walden's ex-wife, previously appeared during the 2007 season as Herb's sister, Myra Melnick.
CBS was not happy because Ashton Kutcher put stickers for companies in which he had a financial interest on his computer so they could be viewed.
Alan refers to his dates in high school being a poster of Molly Ringwald. Jon Cryer co-starred with Molly in Pretty in Pink (1986). His character was a high schooler who was in love with Molly's character.
Walden says marriage is "until death do us part". Alan then says "sure, who died? Not her! Not you!" This is the same line he said in season 1 about Judith, except he said "not her, not me!".