Guest Stars Grant Tremblay as Himself (Astrophysicist) Amber Straughn as Herself (Astrophysicist) Chiara Mingarelli as Herself (Astrophysicist) Sarafina El-Badry Nance as Herself (Astrophysicist) Eric R Christian as Himself (Astrophysicist) Lewis Dartnell as Himself (Astrobiologist) Phil Hopkins as Himself (Theoretical Astrophysicist)
