917 - The Celebration Experimentation
Aired February 25, 2016

The Celebration Experimentation

After more than nine years together, the gang finally celebrates Sheldon's birthday, surprising him with a special guest, on the 200th episode of The Big Bang Theory.

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Guest Stars: Kevin Sussman as Stuart, Christine Baranski as Beverly Hofstadter, John Ross Bowie as Barry Kripke, Sara Gilbert as Leslie Winkle, Wil Wheaton as Himself, Adam West as Himself

Writers: Chuck Lorre (Story), Eric Kaplan (Story), Jeremy Howe (Story), Steven Molaro (Teleplay), Steve Holland (Teleplay), Tara Hernandez (Teleplay)

Director: Mark Cendrowski

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Episode Notes

  • The title refers to Sheldon's decision to allow his friends to celebrate his birthday with a party.
  • This was the 200th episode of The Big Bang Theory.

Quotes (54)

Leslie Winkle: Uh, in the past, I would've said something obnoxious, like, "Happy birthday, dumbass". But I'm not gonna do it. You and I have both grown a lot, and it's just so nice to see you all again. So happy birthday, Sheldon.
Sheldon: Oh. Oh, now, you know I hate change. Say it.
Leslie Winkle: Happy birthday, dumbass!

Barry Kripke: Someone call Animal Control. There's a cougar on the loose.
Beverly Hofstadter: Barry, stop.
Leonard: Seriously, Barry, stop.

Leonard: Sheldon, we've been together so long, it's hard to remember a time you weren't in my life. And believe me, I try.
You make me laugh.
You make me a better scientist.
You make me crazy.
You're more than just my roommate, you're my brother.
Sheldon: Thank you.
Leonard: Happy birthday, buddy.

Amy: We've got someone who couldn't be here but really wanted to wish you a happy birthday.
Stephen Hawking: Hello, Sheldon.
Sheldon: (gasps) Professor Hawking.
Stephen Hawking: Happy birthday to you.
Sheldon: Thank you so much. I can't believe you're-
Stephen Hawking: Happy birthday to you.
Sheldon: Oh, you're singing. Well, I'm sorry.
Stephen Hawking: Happy birthday, dear Sheldon.
Leonard: Uh, Professor Hawking, if you just give us one second, we'll light the candles, and we can all sing together.
Stephen Hawking: I was crushing it, but all right.

Penny: Sheldon, can I come in?
Sheldon: How do you know I'm not using the facilities?
Penny: Because you e-mail me your bathroom schedule once a week, even though I've clicked unsubscribe, like, a thousand times.

News Stories

Title Date Posted
917 'The Celebration Experimentation' Press Release February 18, 2016

CBS has issued the press release for the 200th episode of The Big Bang Theory, "The Celebration Experimentation", which airs next Thursday, February 25. The episode is packed with regular The Big Bang Theory guest stars with Christine Baranski, John Ross Bowie, Sara Gilbert and Wil Wheaton all appearing alongside special guest star Adam West.  Full story

Comments (8)

Larry United States, 14:05 Mar 3 2016.
This show was actually funny. I just saw it on the CBS site. I forgot to see it last Thursday night, and since PBS was doing a fund drive, it's funny that I forgot, because I shouldn't have. Lately I've been trying to see whatever detective show is on PBS during the long commercial breaks on Big Bang Theory. The writers did a great job in writing funny lines. That's been missing for quite some time. Sheldon in particular hasn't had many funny lines in the last three or four years, as he had so much in the first fews seasons, and they fit the change in personality he's gone through since his hookup with Amy. Leonard was his usual sarcastic self, but the timing of his comments were perfect. Kripke trying to hit on Leonard's mom was brilliant! And having Leslie Winkle on against just to call Sheldon a "dumb ass:" doesn't get much better than that. Then Penny; what can one say about her but that she really has a connection with Sheldon that proves men and women can be friends, TV make believe or real life. There was no need for physical humor in this show.
John United Kingdom, 08:54 Mar 2 2016.
One of the better one of season nine. It was good to see Lesley Winkle again
pala Hungary, 13:08 Feb 28 2016.
it was good to see Leslie Winkle again :o) thx
norriw United States, 12:14 Feb 26 2016.
And at the end of this episode, @ Kenyon 1:22 , Sheldon mentions he's going out to (Amy's ) car to retrieve something but comes tearing back up the stairs and locks himself in the bathroom again because his twin from previous episode Missy is looming in the lobby with a boisterous entourage of young children and wisecracking girl friends from Sheldon's childhood parties recounted earlier in the episode
John Kenyon United States, 01:22 Feb 26 2016.
This episode had a lot of potential but I was diappointed that Adam West did not actually dressed up in his batman outfit, I met him personally years ago in a auto show in Columbus, Ohio. He looked great and was in costume. It would have been funny had he been dressed as batman in the car with bystanders yelling it's batman or con fussing him with Michael Keaton. The group in the car would stop at a convenient store only to have it robb*d and in walks batman. Which the crook recognizes Adam West breaks down because he always wanted to be one of the good guys. West talks him out of robbing the sore and gives him a autograph picture of himself, he sells it for $10.00, because he needs to supplement his social security checks. I wish they had done a scene involving the elevator because Howard would have made a remark about using a bat pole to get to the fifth floor. Raj would have commented about watching the show and after watching batman and robin go from the mansion to the batcave he would say something stupid like fantasizing about going down on batman and robins pole. It was great to see all the others at the party but I would of laughed had Leonard's mother gone home with Adam West. Because as she would tell him there is something about a man wearing a cape and cowl.
Lebron Kenney United States, 09:39 Feb 23 2016.
Sorry i mispelled my name its not Lebron Kennet its Lebron Kenney
Lebron Kennet United States, 14:37 Feb 22 2016.
I love this show and for all those idiots who say this show has a laugh track go on Studio Audience unlimited this show is always sold out and it has been the #1 comedy since 2012 and 20 million people tune in every week just to watch it. Also the only reason you say The Big Bang Theory isn't funny is because your not whitty only whitty people get the jokes.
Mandy Bare United States, 22:02 Feb 21 2016.
I just wanted to let the cast and crew know that you guys are awesome! I'm a mom of 3 kids and my 8 year old can say the lines of almost every episode because he loves the show just as much as I do. I catch myself telling him to stop but it's just so darn cute! His favorite is Sheldon so I may have my hands full!

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