Carl Sagan

Carl Sagan first made a cameo appearance in Einstein vs Stephen Hawking. He later returned as a cameo in Sir Isaac Newton vs Bill Nye. He was portrayed by EpicLLOYD both times.

Information on the Cameo
Carl Edward Sagan (November 9, 1934 – December 20, 1996) was an American astronomer, astrophysicist, cosmologist, author, science popularizer, and science communicator in astronomy and natural science. He is mostly known for the books he wrote, as well as his dedication to finding extraterrestrial life. For most of his career, he was a professor of astronomy at the Cornell University. He also co-wrote the 13-part series: "Cosmos, A Personal Voyage", featuring the famous line, "If you wish to make an apple pie from scratch, you must first invent the universe." At the age of 62, Sagan died of pneumonia.

Einstein vs Stephen Hawking
Sagan appeared after Stephen Hawking said the line, "I'm about to bake raps from scratch like Carl Sagan," giving a thumbs up. He appeared again after Stephen Hawking said, "I'm a super computer. You're like a TI-82!" during the "Oooh!" at the end.

Sir Isaac Newton vs Bill Nye
Sagan appeared during Bill Nye's verse after Nye said the line, "But your circle of friends was shoddy," but as reused footage.

Trivia

 * He is the third cameo to return in a later battle, after Johann Sebastian Bach and Stormtrooper.
 * Both Sagan and Bach returned through reused footage of them.
 * All 3 of these characters first appeared in Season 1.
 * Lloyd is not credited as Carl Sagan in Sir Isaac Newton vs Bill Nye.
 * This could be because Sagan's appearance was only reused footage.
 * Both times Sagan appears, he has a cameo doing some form of the "Oooh!" exclamation.
 * In Einstein vs Stephen Hawking, he appears during Stephen Hawking's "Oooh!" at the end.
 * In Sir Isaac Newton vs Bill Nye, he appears during Bill Nye's "Oooh!"
 * The reason for this is because the footage from the first appearance was reused.
 * The only difference between Sagan's two cameos is that in Einstein vs Stephen Hawking, he only makes a face when Stephen Hawking says "ohhh!" In Sir Isaac Newton vs Bill Nye, Sagan actually says the "Ohhh!" (in EpicLLOYD's real voice).