An audience woman shares her own tick bite experience with Dave; Alan narrates a history of the Ed Sullivan Theater, then cuts himself off to use the washroom; Demi Moore discusses leach therapy and plugs Flawless; Counting Crows perform "You Can't Count On Me."

Leonard and Sheldon each lie to avoid seeing Penny's concert, but Sheldon's is a bit too complicated for his own good.

Episode info coming soon ..