The Big Bang Theory: Season 5, Episode 9

The Ornithophobia Diffusion (10 Nov. 2011)

TV Episode  -   -  Comedy
Your rating:
    1 2 3 4 5 6 7 8 9 10 -/10 X  
Ratings: 8.3/10 from 1,226 users  
Reviews: 3 user | 1 critic

Sheldon tries to overcome his fear of birds, while Leonard and Penny attempt to hang out together strictly as friends.



(created by), (created by), 6 more credits »
0Check in

Watch Now

From $1.99 on Amazon Instant Video

User Lists

Related lists from IMDb users

a list of 24 titles
created 24 Apr 2012
a list of 24 titles
created 29 Aug 2012
a list of 111 titles
created 19 Oct 2012
a list of 39 titles
created 21 Nov 2013
a list of 797 titles
created 11 months ago

Related Items

Connect with IMDb

Share this Rating

Title: The Ornithophobia Diffusion (10 Nov 2011)

The Ornithophobia Diffusion (10 Nov 2011) on IMDb 8.3/10

Want to share IMDb's rating on your own site? Use the HTML below.

Take The Quiz!

Test your knowledge of The Big Bang Theory.

User Polls

« Previous Episode | 97 of 186 Episodes | Next Episode »





Episode complete credited cast:
Penny (as Kaley Cuoco)


A blue jay perched on his apartment window ledge is too much for ornithophobic Sheldon to handle. As no one - even the authorities (gasp) - seems to want to help him shoo away the bird, a scared Sheldon does whatever he can to get rid of the bird in any way he can. He turns to his two biologist friends, Amy and Bernadette, who try to help him get him over his fear. Their attempts have unexpected results. Meanwhile, Penny asks Leonard if he wants to go see a movie with her. He realizes that Penny's invitation is not a date, despite he deep down wanting it to be. But once he gets over the notion that this event is not a date, Leonard is able to relax and enjoy his time out, even more than when they were actually dating. As Leonard makes it abundantly clear to Penny that it not being a date has its own consequences, Penny decides to take her own actions to prove to Leonard that it is indeed not a date. Written by Huggo

Plot Summary | Plot Synopsis




See all certifications »




Release Date:

10 November 2011 (USA)  »

Company Credits

Show detailed on  »

Technical Specs


Sound Mix:


Aspect Ratio:

16:9 HD
See  »

Did You Know?


Title reference: Ornithophobia is a type of specific phobia defined as an abnormal, irrational fear of birds. See more »


When Sheldon puts the bird's water cup on the end table, a red blotch on the cup faces the camera. The cup rotates by itself to a blotch-free side between shots. Also, the cup disappears completely when the bird flies out the window. See more »


Bernadette Rostenkowski: [picking up the bird] He's a sweetie.
Sheldon Cooper: Yes, it's very sweet. Now, slowly and carefully... flush him down the toilet.
Amy Farrah Fowler: Sheldon, the only way to get past this fear is to interact with it. Just like you did with the mailman.
See more »

Crazy Credits

CHUCK LORRE PRODUCTIONS, #366 [Image of a cluttered desk containing a Mac SE, a glass of bourbon, dirty ashtrays, pencils, erasers, etc.] This photograph was my vanity card when I was working on Grace Under Fire and Cybill. I remember deciding on its composition by asking myself what were some of my favorite things. The answer, as you can see in the picture, was tobacco, bourbon and an old Mac computer. Eighteen years later, I still love my Mac. The other two items, despite my eternal affection, have been replaced with a bronchial inhaler and a metal folding chair in a church basement. See more »


References Cybill (1995) See more »


The Big Bang Theory Theme (Instrumental)
Composed and Performed by Barenaked Ladies
See more »

Frequently Asked Questions

This FAQ is empty. Add the first question.

User Reviews

very clever, good episode
20 June 2013 | by (Brooklyn NY) – See all my reviews

This is one of their better episodes. Besides being funny very often and showcasing Parson's (Sheldon) great acting abilities, I found the episode to be be very CLEVER about the tired old topic of nerdy, low self-esteem Leonard groveling for sex from pretty powerful Penny, but NO! Usually you NOT ONLY SEE this (Leonard's groveling), but you have to HEAR them all discussing all aspects of coitus -- wanting it, pursuing it, getting over it, etc, etc. Here, though, it was very cleverly well done. Since former lovers Leonard and Penny said they were on a friendship date, not the usual sex-romantic date, Leonard (and then Penny too) changed the usual routine and conversation -- like speaking his own mind, demanding his own choice of movie, hooking up with another girl while on the date. So, to repeat, I usually wince when I see Leonard and Penny speak openly and cloyingly about their love life, here it was rather fresh, different. Good job.

The second half of the episode was also nicely done -- about Sheldon trying to shoo a bluebird away from his apartment. The Leonard-Penny half was mostly clever with some comedy thrown in. The Sheldon-blue bird half was mostly Sheldon outraged at this comedy best.

1 of 1 people found this review helpful.  Was this review helpful to you?

Message Boards

Recent Posts
Casting ideas for Leonard and Penny's families. ash1111995
Why does Bernadette always wear dark tights? mom2wolf-1
My beef with Amy and Sheldon's relationship sportyspice_rogue
Anyone watch Christmas Vacation every year? Smx79
This Would Never Happen in India! TheCookieMonster92
Kim Kardashian to join the show????? calliestephen
Discuss The Ornithophobia Diffusion (2011) on the IMDb message boards »

Contribute to This Page

Create a character page for: