: After accidentally seeing Gates' itinerary on Penny’s phone, Leonard leads Howard and Raj to a hotel stakeout. Leonard eventually meets Gates but ruins the moment—and his own tie—by crying from excitement.

You can find more detailed recaps on the Big Bang Theory Wiki or watch the episode on platforms like Apple TV or TBS . The Big Bang Theory - The Gates Excitation S11E18 [1080p]

: Penny is assigned to be Bill Gates' guide during his visit to her office. Despite relentless begging from Leonard, Howard, and Raj, she refuses to let them tag along to a professional work function.

: Because it is April 1st, Sheldon is convinced that the entire Bill Gates visit is an elaborate April Fool's prank played by Penny.

While Stuart watches the kids, Bernadette and Amy go out for lunch.

: This episode is one of the rare times Sheldon becomes the victim of a successful prank because of his own overthinking.