: When Penny later mentions that Gates remembered a "crying fan" with a ruined tie, Leonard has to pretend he was never there to avoid getting in trouble with her. The "April Fool's" Prank
While Stuart watches the kids, Bernadette and Amy go out for lunch. [S11E18] The Gates Excitation
: Because it is April 1st, Sheldon is convinced that the entire Bill Gates visit is an elaborate April Fool's prank played by Penny. : When Penny later mentions that Gates remembered
: Once he realizes it's actually real, he desperately tries to find Gates. However, he ends up being the one pranked when the others send him to the wrong hotel. Bernadette’s "Mommy Brain" [S11E18] The Gates Excitation