[s4e8] The 21-second Excitation -

Meanwhile, Penny and Bernadette host a "girls' night" that takes a turn when invites herself along.

Sheldon flees the theater with the film while humming the iconic Indiana Jones theme song. Wil Wheaton leads an angry mob of moviegoers to chase him down. The First Slumber Party [S4E8] The 21-second Excitation

In an attempt to cheer Penny up based on her research of slumber party traditions, Amy suggests activities like eating raw cookie dough or "experimental lesbianism," eventually startling Penny by entering her bedroom late at night. The 21-Second Excitation | The Big Bang Theory Wiki Meanwhile, Penny and Bernadette host a "girls' night"