Guest Stars Grant Tremblay as Himself (Astrophysicist) Amber Straughn as Herself (Astrophysicist) Chiara Mingarelli as Herself (Astrophysicist) Max Tegmark as Himself (Theoretical Physicist) Claudia de Rham as Herself (Theoretical Physicist) Stephon Haigh-Solomon Alexander as Himself (Theoretical Physicist) Andrew Pontzen as Himself (Cosmologist) Phil Hopkins as Himself (Theoretical Astrophysicist)