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The Big Bang Theory S9E9 — The Platonic Permutation
7.7
The Big Bang Theory•Season 9•Episode 9

The Platonic Permutation

7.7/10 · 3,869 votesNov 19, 201521 min

Ranked #7 of 24 in Season 9•+0.1 vs season avg

Discussion

Sheldon and Amy try hanging out as friends when they spend Thanksgiving together at the aquarium. Also, Wolowitz reluctantly agrees to volunteer at the soup kitchen with Bernadette, Raj and Emily, and Penny discovers that Leonard knows more about her than she thought.

Directed byMark Cendrowski
Previous episodeE8 · The Mystery Date ObservationNext episodeE10 · The Earworm Reverberation
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Season 9 Episodes24

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The Separation Oscillation

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The Helium Insufficiency

The Spock Resonance stillE7 7.9

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The Platonic Permutation

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The Opening Night Excitation stillE11 9.0

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The Sales Call Sublimation stillE12 7.4

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The Valentino Submergence stillE15 7.5

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The Positive Negative Reaction stillE16 7.4

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The Application Deterioration stillE18 7.5

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The Line Substitution Solution stillE23 7.4

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The Convergence Convergence stillE24 7.8

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Cast7

Johnny Galecki

Johnny Galecki

Leonard Hofstadter

Jim Parsons

Jim Parsons

Sheldon Cooper

Kaley Cuoco

Kaley Cuoco

Penny

Simon Helberg

Simon Helberg

Howard Wolowitz

Kunal Nayyar

Kunal Nayyar

Rajesh Koothrappali

Melissa Rauch

Melissa Rauch

Bernadette Rostenkowski

Mayim Bialik

Mayim Bialik

Amy Farrah Fowler

Crew12

Mark Cendrowski

Mark Cendrowski

Director

Tara Hernandez

Tara Hernandez

Story

David Goetsch

David Goetsch

Co-Executive Producer

Eric Kaplan

Eric Kaplan

Co-Executive Producer

Maria Ferrari

Maria Ferrari

Co-Executive Producer

Steve Holland

Steve Holland

Teleplay

Steve Holland

Steve Holland

Co-Executive Producer

Jim Reynolds

Jim Reynolds

Co-Executive Producer

Maria Ferrari

Maria Ferrari

Teleplay

Jeremy Howe

Jeremy Howe

Story

Jim Reynolds

Jim Reynolds

Story

A

Adam Faberman

Teleplay

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Episode Summary

"The Platonic Permutation" is episode 9 of The Big Bang Theory season 9. It scored 7.7/10 from 3,869 votes, ranking #7 of 24 episodes this season (season average 7.6). Directed by Mark Cendrowski, it aired on November 19, 2015.

Next: E10 · The Earworm ReverberationBest of Season 9