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Appearances
How the Universe Works
Guest cast, played by Michael R. Rampino
- Episode 5x07: The Dark Matter Enigma (Jan 31, 2017)
- Episode 8x09: Earth's Death Orbit (Feb 27, 2020)
Guest cast, played by Paul E. Olsen
- Episode 8x09: Earth's Death Orbit (Feb 27, 2020)