Birth of the Earth  (2012)

Himself - Narrator (voice)

Himself - Theoretical Physicist, City University of New York (as Prof. Michio Kaku)

Himself - Theoretical Physicist, Arizona State University (as Prof. Lawrence Krauss)

Himself - Apollo 9 Astronaut, B612 Foundation (as Rusty Schweickart)

Narrator (voice) (as Erik Todd Dellums)

Himself - Astronomer, Discover Magazine (as Dr. Phil Plait)

Herself - Astronomer, NASA Goddard Space Flight Center (as Dr. Michelle Thaller)

Himself - Planetary Scientist, Southwest Research Institute (as Dr. Hal Levison)

Himself - Astronomer, University of California: Berkley (as Prof. Geoff Marcy)

Himself - Planetary Astronomer, Planetary Science Institute (as Dr. Mark Sykes)

Himself - Experimental Physicist, Institute of Geophysics and Extraterrestrial Physics (as Prof. Jürgen Blum)