The Big Bang Theory/The Platonic Permutation

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The Platonic Permutation
Season 9, Episode 9
Airdate November 19, 2015
Production Number 4X7209
Teleplay by Steve Holland &
Maria Ferrari &
Adam Faberman
Story by Jim Reynolds &
Jeremy Howe &
Tara Hernandez
Directed by Mark Cendrowski
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The Big Bang TheorySeason Nine
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The Platonic Permutation is the ninth episode of the ninth season of The Big Bang Theory, and the one hundred ninety-second episode overall.

Starring: Johnny Galecki (Dr. Leonard Hofstadter), Jim Parsons (Dr. Sheldon Cooper), Kaley Cuoco (Penny Hofstadter), Simon Helberg (Howard Wolowitz), Kunal Nayyar (Dr. Rajesh "Raj" Koothrappali), Mayim Bialik (Dr. Amy Farrah Fowler), Melissa Rauch (Dr. Bernadette Rostenkowski-Wolowitz), Laura Spencer (Emily Sweeney)

Special Appearance by: Elon Musk (Himself)

Guest Starring: Wayne Wilderson (Travis)


Plot Overview


Arc Advancement





The Show

Behind the Scenes

Allusions and References

Memorable Moments