: This episode adds Bill Nye to the long list of celebrities who have filed restraining orders against Sheldon, including Leonard Nimoy, Stan Lee, and Carl Sagan.
: Sheldon is seen wearing a Sinestro Corps (Yellow Lantern) shirt, which symbolizes "fear"—a nod to the tension in his relationship with Arthur during the episode. [S7E7] The Proton Displacement
: Meanwhile, Raj joins the "girls' night" with Penny, Amy, and Bernadette to make jewelry. Howard crashes the evening, using his high-tech tools to "improve" their crafts, which upsets Raj, who feels his safe space for expressing his feminine side is being invaded. Cast and Key Guest Stars : This episode adds Bill Nye to the
: Arthur Jeffries' character mentions that Bill Nye "stole" his show, a humorous reference to the real-life influence of scientific edutainment pioneers like Don Herbert (Mr. Wizard) on later shows. The Proton Displacement | The Big Bang Theory Wiki | Fandom Howard crashes the evening, using his high-tech tools