Sergio Enrique

The guys kick Sheldon off the team for the Physics Bowl and enlist his nemesis Leslie Winkle (recurring guest star Sara Gilbert) to take his place.

The tornado destroys Mrs. McCluskey's house, and Lynette faces the possibility that her family may not have survived; Katherine discovers that someone knows about her mysterious past.

An anonymous source contacts Charlie and provides advance details on an imminent story of national importance. When news breaks that the President will be making a televised speech that night, the 2.0 staff cuts short its one-year (and one week) anniversary party, and rushes back to the newsroom amidst a flurry of speculation as to what exactly happened.