Guest Stars Sarafina El-Badry Nance as Herself (Astrophysicist) Grant Tremblay as Himself (Astrophysicist) Amber Straughn as Herself (Astrophysicist) Chiara Mingarelli as Herself (Astrophysicist) Max Tegmark as Himself (Theoretical Physicist) Phil Hopkins as Himself (Theoretical Astrophysicist)