Scientist Cameos
As the theme of the show revolves around science, many distinguished and high profile scientists have appeared as guest stars on the show. Famous astrophysicist and Nobel laureate George Smoot had a cameo appearance in episode 17 "The Terminator Decoupling", of the second season. Theoretical physicist Brian Greene also appeared on the show in "The Herb Garden Germination", episode 20 of the fourth season. Astrophysicist and science populizer Neil deGrasse Tyson appeared in "The Apology Insufficiency", episode 7 of the fourth season. Cosmologist Stephen Hawking made a short guest appearance in the fifth-season episode "The Hawking Excitation" on April 5, 2012. In the episode he meets Sheldon Cooper and points out a mistake in his new Higgs boson analysis. Hawking also speaks on the phone at the end of the episode "The Extract Obliteration" with Sheldon, but is not seen on-camera. In the end of season 5 and the beginning of season 6 NASA astronaut Michael J. Massimino was featured as himself multiple times in the roll of Howard's fellow astronaut.
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Famous quotes containing the word scientist:
“My mother made me a scientist without ever intending to. Every other Jewish mother in Brooklyn would ask her child after school: So? Did you learn anything today? But not my mother. “Izzy,” she would say, “did you ask a good question today?” That difference—asking good questions—made me become a scientist.”
—Isidor Isaac Rabi (20th century)