Guest Stars Amber Straughn as Herself (Astrophysicist) Grant Tremblay as Himself (Astrophysicist) Alex Filippenko as Himself (Astrophysicist) Chiara Mingarelli as Herself (Astrophysicist) Gibor Basri as Himself (Astrophysicist) Phil Hopkins as Himself (Theoretical Astrophysicist)
