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