On Gilmore Girls,

two days after his by-pass surgery, Richard is on the road to recovery, and Rory returns to Yale, where she finds that Richard's economics class is now being taught by an attractive young TA, Tucker Culbertson, who flusters Rory with his charm. While Lorelai tries to distract herself from the issues in her marriage, she and Sookie focus on planning a funeral for one of Michel's beloved dogs. Finally, Christopher returns ready to talk, and he and Lorelai discuss the main problem that has haunted their marriage – Lorelai's feelings for Luke. On Law & Order: Special Victims Unit, after a young girl is found dead in the apartment of a vacationing couple with no children, Stabler and Benson soon learn that there have been a number of high school students having floating parties, going from house to house and getting drunk. Unfortunately, charging any of the teens with murder proves problematic, but the detectives get a break when they learn that one of the teen's mothers had been providing the alcohol as well as sleeping with one of the students. On Beauty and the Geek, one of the women is in tears when she must work the Dewey Decimal System. On Grey's Anatomy, Callie and George make a big decision. A successor to Chief Webber is named. A man named Jeff Pope arrives. He is looking for his wife and newborn child. Cristina and Burke's wedding day has arrived and so have the interns first-year exam results.

... and lots of other things I learned because of her period.