Guest Stars Michio Kaku as Himself (Michio Kaku, PH.D. - Author / Theoretical Physicist) Ben McGee as Himself (Ben McGee - Plantary Geophysicist) Paul M. Sutter as Himself (Paul Sutter, Ph.D. - Theoretical Cosmologist) Travis Taylor as Himself (Travis Taylor, Ph.D. - Astrophysicist / Aerospace Engineer) Konstantin Batygin as Himself (Konstantin Batygin, Ph.D. - Prof. Planetary Science, CalTech) Mike Brown as Himself (Mike Brown, Ph.D. - Planetary Astronomer, CalTech)
