The 10 Funniest, Best Big Bang Theory Episodes

Updated on April 19, 2016


Looking for a list of the top 10 Big Bang Theory episodes?

Here are my 10 favourite episodes of the brilliantly-scripted hit TV show The Big Bang Theory.


1. The Staircase Implementation - Season 3, Episode 22

In this flashback episode, Leonard describes to Penny how he and Sheldon met and became roommates.

Best moments:

  • Sheldon administers a roommate screening test to determine Leonard's suitability as a roommate.
  • The roommate agreement makes its first appearance.
  • While Leonard is insisting that his latest experiment is safe, Sheldon silently takes the experiment from Leonard, deposits it on the apartment elevator floor, and gets Leonard and himself out of the elevator, before shutting the elevator doors behind them. When an explosion is then heard from the elevator shaft, it turns out that Sheldon has saved both of their lives.

2. The Flaming Spittoon Acquisition - Season 5, Episode 10

When Amy (Sheldon's friend who's a girl and a friend, but not his girlfriend) tags along on the guys' weekly trip to the comic book store, she draws the attention of Stuart, the comic book store owner. Before asking Amy out, Stuart has Leonard run it by Sheldon, who states that the point is moot, as Amy is a noted neurobiologist and would never been interested in Stuart.

Once Amy goes out with Stuart, Sheldon displays various classic signs of jealousy, including stalking Stuart via Facebook, being overly defensive, and trying to make Amy jealous by asking out Penny.

Finally, Sheldon mans up and asks Amy to be his girlfriend.

Best moments:

  • Sheldon (after interrupting Amy and Stuart's date at the movie theatre): With the understanding that nothing changes whatsoever, physical or otherwise, I would not object to us no longer characterizing you as not my girlfriend.
    Amy: Interesting. Now try it without the quadruple negative.
    Sheldon: You're being impossible.
    Amy (snuggling up to Stuart): Hi Stuart.
    Sheldon: Fine! Amy, will you be my girlfriend?
  • Once Amy has agreed to be his girlfriend, Sheldon asks her to sign a 31-page relationship agreement, which includes a section indicating when handholding is acceptable (only as a lifesaving measure, a post-Nobel Prize handshake, or during flu shots), and a section on "booboos and ouchies".

    This was a fabulous episode! Such tremendous personal growth for Sheldon.

3. The Roommate Transmogrification - Season 4, Episode 24

In this exciting finale to Season 4, plot twists turn the gang's world upside-down.

Howard feels like a kept man, with his fiancée Bernardette finishing her Ph.D. dissertation and accepting a lucrative job offer. Leonard continues to date Raj's sister Priya while she is staying over at Raj's. After overhearing Leonard and Priya acting out Star Trek sex fantasies in his apartment, Raj can't take it anymore, and ends up switching bedrooms with Leonard, who agrees to temporarily take on Raj as his new roommate.

Best moments:

  • Howard: "You bought me a Rolex?!? How much did this cost?"
    Bernadette: "You let me worry about the money. I just want my baby to have pretty things."
  • After an evening of free-flowing alcohol, Penny wakes up in bed with a mute Raj. To quote Penny: "Really? Still can't talk to me???"
  • Penny & Raj's walk of shame through Sheldon's apartment, in view of Leonard, Sheldon, and Howard, is priceless.

    Yet another terrific cliffhanger.

4. The Agreement Dissection - Season 4, Episode 21

Sheldon tags along on Penny, Amy & Bernadette's girls' night out, an evening of alcohol, inebriation, and dancing. Using her training as a lawyer, Priya nullifies Sheldon & Leonard's roommate agreement.

Best moments:

  • After Sheldon admits he's never kissed a girl (other than female relatives), a drunken Amy offers her lips up to Sheldon in order for him to experiment with kissing, but he declines.
  • Sheldon to Amy: "I understand the alcohol has stirred up whatever it is that makes girls go wild."
  • The drunken Amy finally steals a kiss from Sheldon, before throwing up!
  • Sheldon blackmails Leonard into signing a revised roommate agreement by threatening to email Priya's parents about her relationship with Leonard.

5. The Prestidigitation Approximation - Season 4, Episode 18

Despite his superior intellect, Sheldon cannot figure out how Howard's new magic trick works.

Best moments:

  • At the episode's end, when the camera pans to show us the playing cards from Howard's magic trick, we realize that the entire gang has been in on the card trick, in order to fool Sheldon.

6. The Lunar Excitation - Season 3, Episode 23

Unknownst to Sheldon, his friends sign him up for online dating, and a perfect match is revealed. In this third-season finale, Mayim Bialik does a fabulous job guest-starring as Sheldon's match, neurobiologist Amy Farrah Fowler.

Best moments:

  • Reluctantly, Sheldon goes on his first date, meeting a brilliant woman who's just like him. Surprisingly, the first hint of Sheldon's interest in a fellow human appears.

    A great season 3 cliffhanger that kept me wondering about Sheldon's love life all summer.

7. The Adhesive Duck Deficiency - Season 3, Episode 8

While the rest of the guys are camping in the desert waiting for the Leonid meteor shower, Sheldon rescues Penny after she slips and falls in her bathtub and dislocates her shoulder. Sheldon chastises Penny for not having non-slip stickers (like his adhesive duck stickers) on her bathtub floor to avoid such mishaps.

Best moments:

  • Sheldon (while filling in Penny's hospital admission form): "Cause of accident? Lack of adhesive ducks."
  • After their emergency room visit, Sheldon sings Soft Kitty in the round with a hospital drug-addled Penny.
  • After eating "special" cookies baked by the hippies at the neighbouring campsite, Leonard, Raj, and Howard run through the gamut of psychedelic behaviour, including Howard admitting that he lost his virginity to his second cousin.

8. The Bath Item Gift Hypothesis - Season 2, Episode 11

Sheldon's gift-giving rituals annoy his friends at Christmas. Meanwhile, Penny goes out with one of Leonard's hot coworkers.

Best moments:

  • Unsure of what Penny will be getting him for Christmas, Sheldon purchases several bath gift sets in different price ranges, in order to have one gift of equal value on hand upon seeing her gift to him, and with the intent of returning all of the other baskets after exchanging gifts with Penny.

    When Penny presents him with a napkin autographed by Star Trek actor Leonard Nimoy, Sheldon is overcome by emotion and gives her an awkward hug.

    Sheldon then gives her ALL of the bath gift sets.

9. The Maternal Congruence - Season 3, Episode 11

  • Christine Baranski makes her second appearance as Leonard's ever-critical mother, a psychiatrist who gets on famously with Sheldon, but who isn't as close to Leonard.

Best moments:

  • While drunk, Leonard's mother kisses Sheldon.

10. The Alien Parasite Hypothesis - Season 4, Episode 10

Sheldon's friend Amy Farrah Fowler (who's a friend and a girl, but not a girlfriend) discovers that she has sexual feelings for Penny's ex-boyfriend, Zack.

Best moments:

  • While visiting Amy in her lab, Sheldon and Amy reach the surprising conclusion that she was sexually aroused by Zack. When Amy asks Sheldon if he's jealous, he doesn't answer, and attempts to pack up his lunch and leave, only to accidentally pack up the brain slices from Amy's lab research. Is that a hint of jealousy?
  • Despite feeling quite aroused by Zack's brief handshake at the bar, Amy realizes that she can't be with someone of such limited intellect and leaves the bar. Outside, she then takes Sheldon's hand as an experiment, but drops it, declaring that there's "nothing".


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    • profile image

      Sheldor the Conqueror 6 weeks ago

      Fellow warriors, this is Sheldor the Conqueror. Season 2 episode 3.

    • profile image

      anonymous 9 months ago

      the allowance evaporation is one of my favourites. i know its a very recent episode (season 10) but i loved it

    • profile image

      Lori 16 months ago

      My fave is The Einstein Approximation. The scene in the pool of balls where he hides and pops up saying " bazynga" made me laugh so hard! 3/14 episode.

    • VancouverGal profile image

      VancouverGal 3 years ago from Canada

      Thanks, Mike! And THAT was a pretty epic moment!

    • profile image

      Mike 3 years ago

      Definitely with you on the one that Season 3 Episode 22 is first. Only flashback episode they have made. I was almost peeing myself laughing when Sheldon turned the apartment flag upside down on the fridge before he went to save Leonard's life. Best show ever!

    • VancouverGal profile image

      VancouverGal 4 years ago from Canada

      Thank you, Prajwal!

    • prajwalpokharel profile image

      prajwal pokharel 4 years ago from kathmandu

      Haha ...... this show is the funniest... i have put this show in #1 of my top 5 sitcom hub.... i was hoping that the funniest will be the roomate introduction .... you have put it in #1 as well .... great job love

    • VancouverGal profile image

      VancouverGal 4 years ago from Canada

      That's so awesome!! Glad you like this list, and have fun getting caught up on the whole series!

    • profile image

      Eric Erickson 4 years ago

      Thanks for this list!! I have watched the show here-and-there over the last few years, and just decided to buy a few episodes on iTunes. I literally just bought these ten as a starting point.

    • VancouverGal profile image

      VancouverGal 4 years ago from Canada

      Thank you! Glad for an embarrassment of riches when it comes to picking just the very best episodes!

    • stanmurphy profile image

      Stan Murphy 4 years ago from Kansas

      Love Big Bang ! I was late to the party, coming in at Season 3, but thankfully reruns abound! Such a good article choice and fun to debate!

    • profile image

      Eeshan 4 years ago

      S05E17 is AWESOME

    • profile image

      Natasia 5 years ago

      Season 2, Episode 2 is up there with the best - The Griffin Equivalency. Sheldon does a stellar job here in faking enthusiasm for Raj's discovery.

    • profile image

      Jason 5 years ago

      Best episode by far, Season 4 Ep 1 - The Robotic Manipulation

    • VancouverGal profile image

      VancouverGal 5 years ago from Canada

      Good choice! The Grasshopper Experiment is such a classic!

    • profile image

      meerkat 5 years ago

      i like se1 ep8

    • VancouverGal profile image

      VancouverGal 5 years ago from Canada

      It's Episode 9 on this list - in The Maternal Congruence (Season 3, Episode 11), Leonard's mother gets drunk and kisses Sheldon!

    • profile image

      miamiguy 5 years ago

      Does anyone know which episode Sheldon and Leonards mother got together ?

    • VancouverGal profile image

      VancouverGal 5 years ago from Canada

      Thanks so much Alecia!

    • Alecia Murphy profile image

      Alecia Murphy 5 years ago from Wilmington, North Carolina

      This show is so awesome! And I'm glad that the addition of Bernadette and Amy have only added to the hijinks that go on. I do love it when Sheldon hugs Penny and my next favorite moment has to be when everyone holds hands to see Howard off into space- such a seminal moment. You did a great job with this list!

    • VancouverGal profile image

      VancouverGal 6 years ago from Canada

      Thanks so much! This show resonates with me the same way because I am a computer nerd by profession...

    • pconoly profile image

      Pamela K Conoly 6 years ago from Fort Worth,Tx.

      Totally love this show! I have actually worked with people like this. That's why its kind of special to me.I work on my computer all the time even while everyone around me might be watching TV but I will shut it down just for this show! Thanks for writing this!

    • profile image

      penguinsNcookies 6 years ago

      The Maternal Congruence is hilarious! I love Christine Baranski as Leonard's mom. She and Sheldon are two peas in a pod and so good. Also, episodes with Wil Wheaton are great. His dynamic with Sheldon is fantastic.

    • profile image

      mommyloves2write 6 years ago

      I could not pick a favorite...I love this entire series!

    • VancouverGal profile image

      VancouverGal 6 years ago from Canada

      Great quote indeed!

    • profile image

      Hie 6 years ago

      I personally LOVE "The Love Car Displacement"

      Bernadette: "... I can tell you, even the tiniest organisms can still tear you a new one."

      Howard: "Interesting. I think hat you might need to know about my colleague is that while she claims her field of interest is tiny organisms, she certainly has spent her share of time on what we can assume is pretty massive weaponry."

    • profile image

      Subash 6 years ago

      My six will be:-

      1.)The Griffin Equivalency

      2.)The Bath Item Hypothesis

      3.)Einstein Approximation

      4.)The Friendship Algorithm

      5.)The Pirate Solution

      6.)The Jerusalem Duality

    • VancouverGal profile image

      VancouverGal 6 years ago from Canada

      That episode is sooo disturbing!

    • profile image

      Sambags 6 years ago

      Best is the robotic arm episode. Funniest by far. Season 4 episode 1

    • VancouverGal profile image

      VancouverGal 6 years ago from Canada

      That one was the Zarnecki Incursion, which was also an awesome episode, especially with Penny's method of getting Sheldon's stuff back!

    • profile image

      anne 6 years ago

      I love the sheldon called the police because someone hacked into his world of war craft account.

      ..." what didn't they steal....?? The part with the police officer was very funny

    • VancouverGal profile image

      VancouverGal 6 years ago from Canada

      I found both the robot arm and the Shelbot episodes so creepy!

    • profile image

      Matt 6 years ago

      I can't believe the first two episodes of season 4 have hardly been mentioned. The robot arm episode and shelbot are hysterical!

    • VancouverGal profile image

      VancouverGal 6 years ago from Canada

      That sounds awesome!

    • VancouverGal profile image

      VancouverGal 6 years ago from Canada

      Glad you can still get caught up on the latest episodes!

    • profile image

      ... 6 years ago

      yay i have 2 shelden jumpers Green Lantern and Robot evolution

    • profile image

      Peter 6 years ago

      So what? We here in germany get only to see, what the stupid cable-companies are able to dub in time, with no original voices at all!

      Thanks to the P2P's there's a way out of this hell...^

    • VancouverGal profile image

      VancouverGal 6 years ago from Canada

      Sorry to hear that, Jayden - glad I have a spoiler warning for folks who haven't seen all the episodes already broadcast in North America!

    • profile image

      jayden 6 years ago

      it sucks for me in Australia we currently only have the 4th season out. I hate how we get big bang theory release so late compared to other places in the world,in Australia the 4 biggest shows going are of course big bang theory, how I met your mother, sons of anarchy and chuck. But we still run behind compared to the rest of the world in the series. idk y but this makes my blood boil! btw I have no idea y i am saying this on here probs cause I just needed to get it off my chest!!!....

    • VancouverGal profile image

      VancouverGal 6 years ago from Canada

      Actually, it's pretty difficult to decide, because there are so many awesome episodes!

    • rednickle profile image

      rednickle 6 years ago from New Brunswick Canada

      Ok frankly speaking in as much your selections seem reasonable i can not really pick out specific episodes and call them my funniest episodes because the show is just funny as a whole


    • profile image

      Muddasir Ali 6 years ago

      I am in love with Big Bang theory.. .

      I have currently watched complete 1st season and few of the second season.

      I think "pilot" and "lizard spock" are greatest and funniest by far.

    • gehrig4 profile image

      gehrig4 6 years ago from Saint Charles, Missouri

      My all time favorite is the bath item gift hypothesis. Sheldon's reaction when Penny gives him the napkin had me rolling on the floor crying I was laughing so hard.

    • VancouverGal profile image

      VancouverGal 6 years ago from Canada

      Sheldon is awesome and really makes this an incredible show. As for the ball pit episode, I actually found it pretty creepy...

    • profile image

      Gismo_Girl 6 years ago

      I think all but one of my favorite episodes have been mentioned: I can't believe no one's named Season 3, Episode 14: The Einstein Approximation. It's when Sheldon is stuck on a problem, and long story short, ends up in a ball pit, in the middle of the night, repeatedly jumping out of the balls exclaming "Bazinga!" Haha, so funny!!

    • fitnesszone profile image

      fitnesszone 6 years ago from New York

      If someone told me to select 10 best episodes of TBBT, I would fail to do so. Each and every episode is hilarious. Just love Sheldon!

    • VancouverGal profile image

      VancouverGal 6 years ago from Canada

      Wow - that's an awesome list you've made for each season! Season 5 is also shaping up to be great so far.

    • profile image

      Liam 6 years ago

      I Love TBBT, And unlike many others I really enjoyed season 4, apart from the utterly awful "Toast Derivation". Not only was that the worst of the season, but set a low I didn't think the series would ever reach.

      I Couldn't Limit it to 10 episodes period, but here are my 10 favourites from each season:


      The Big Bran Hypothesis

      The Luminous Fish Effect (Best of Season)

      The Dumpling Paradox

      The Grasshopper Experiment

      The Cooper-Hodfstader Polarisation

      The Loobenfeld Decay

      The Jerusalem Duality

      The Bat Jar Conjecture

      The Nerdvana Annihilation

      The Tangerine Factor


      The Codpiece Topology

      The Barbarian Sublimation (Best of Season)

      The Cooper-Nowitzki Theorem

      The Panty Pinata Polarization

      The Lizard-Spock Expansion

      The White Asparagus Triangulation

      The Friendship Algorithm

      The Terminator Decoupling

      The Work Song Nanocluster

      The Hodfstader Isotope


      The Pirate Solution

      The Creepy Candy Coating Corollary

      The Guitarist Amplification

      The Adhesive Duck Defficiency

      The Psychic Vortex

      The Large Hadron Collision

      The Precious Fragmentation

      The Pants Alternative

      The Spaghetti Catalyst

      The Staircase Implementation (Best of Season)


      The Hot Troll Deviation

      The Irish Pub Formulation

      The Apology Insufficiency

      The 21-Second Excitation

      The Boyfriend Complexity

      The Justice League Recombination (Best of Series)

      The Bus Pants Utilization

      The Herb Garden Germination

      The Agreement Dissection

      The Roommate Transmogrification

      What I Thought of the episodes on your list:

      "Staircase"-Brilliant. Best of the series

      "Roommate"-A Shoo-in for the top 10

      "Dissection"-Not top 10, but still great

      "Approximation"-I Liked the subplot, but hated the main plot. So not anywhere near the top 10

      "Lunar"-Best Ending ever. Other than that, only good

      "Duck"-Adored it. Top 10 for sure

      "Gift"-Outside of the hug, I didn't like it that much

      "Maternal"-Apart from the kiss, I didn't like it that much

      "Parasite"-Hated. In my top 10 WORST

      "Zarnecki"-Enjoyed it, but didn't love it

      I Love the Sheldon Character. The acting of Jim Parsons is phenomenal.

      Finally, I have really enjoyed the episodes of season 5 so far. I Loved "Skank". Sheldon gives one of his best lines ever.

      "And for the record, I do have genitals. They're functional and aesthetically pleasing"

      Have you seen the S5 ones so far?

    • VancouverGal profile image

      VancouverGal 6 years ago from Canada

      Thanks Alecia! Sheldon is such an awesomely written character - he really brings OCD and Asperger's syndrome to life in such an engaging way.

    • Alecia Murphy profile image

      Alecia Murphy 6 years ago from Wilmington, North Carolina

      I just got into this show, but it is hilarious. I especially love Sheldon and his OCD quirks.

    • VancouverGal profile image

      VancouverGal 6 years ago from Canada

      Yep, this is my geek girl perspective indeed!

      Thanks for adding your picks - especially The Friendship Algorithm and The Hot Troll Deviation!

    • profile image

      James 6 years ago

      and I forgot to see it was a woman posting this

      Seems my GF loves the episodes I loathe as well...gender specific humor I suspect. Not bad, just shows the difference in what women and male geeks find funny.

      Also explains why we have trouble getting

      Friendship Algorithm

      Killer Robot Instability

      Euclid Alternative

      Griffin Equivalency

      Classified Materials Turbelance

      Bath Item gift hypothesis

      All of those are season 2

      I did like

      Adhesive Duck and Vengence formulation from season 3

      and Hot troll deviation (Raj vs Sheldon) and

      The Prestidigitation Approximation (Howard vs Sheldon) were a riot

    • profile image

      James 6 years ago

      I'm sorry ONE episode form Season 2? One of the best seasons of any show on TV?

      and #2 is the episode that KILLED most of the core audience that made the show a cult classic (it no longer will be) in the making?

    • profile image

      Sheldon v 2.2 6 years ago

      Hello, I like a lot of the big bang theory episodes, but priya is a little bit boring.

      What I do like is that thing with the hot beverage, it keeps coming back!

      The episodes are written very good!

      Sorry for bad English, from the Netherlands.


      And later, I'm afraid it's not optional. :P

      Live prosper w

    • profile image

      Thereseeee 6 years ago


      my favorite episodes is all of them :)

      i was wondering if anyone could tell me which episode it is where sheldon keeps drinking of other peoples glasses and then goes to the bar to disinfect his mouth, swallows a bit of alcohol and think he is drunk?

      aaaaand (if i'm not asking to much) could you send me a mail to when answered? :)

    • Megan Kathleen profile image

      Megan Kathleen 6 years ago from Los Gatos, CA

      I agree with everyone who mentioned The Adhesive Duck Deficiency. "Cause of accident? Lack of adhesive ducks..." The best and funniest episodes for me always feature Sheldon and Penny interactions. The Bath Item Gift Hypothesis is another favorite of mine for the same reason, but I would not call it the funniest. And The Guitarist Amplification? Penny and Leonard have to coddle a Sheldon who is upset his "parents" are fighting.

      As for the best of season four, the award has to go to The Love Car Displacement. Amy and Penny friendship, hotel room switches, and Bernadette at her sassiest. Instant classic for me!

    • profile image

      James 7 years ago

      Loobenfield decay is a good episode, Season one has 'good' episodes, not great. Season 2, with the exception of the "romantic" episodes are classics.

      I did like the adhesive duck episode, that would be in my top 10. "There, there" and "The hero always peeks" lol

    • profile image

      rafael 7 years ago

      loobenfeld decay is the best-written episode, very intricate and surprising

    • profile image

      Pfresh 7 years ago

      The Adhesive duck deficiency is the best episode yet. I have not seen anyone mention this episode. did it hit me good or do you agree?

    • profile image

      James 7 years ago

      Not even close...season 3?

      1) 2-13 Friendship algorithm...classic!

      2) 2-05 Euclid Alternative- Sheldon driving?

      3) 4-04 Hot troll deviation -an odd classic in a bad season. Hoaward & Bernadette, plus Raj vs Sheldon

      4) 2-01 Bad Fish paradigm -"I drank milk that taste dfunny"

      5) 2-07 The panty pinanta polarization -Penny vs Sheldon and Sheldon suffers his 1st loss

      The pIrate Solution and Lizard Spock are close ...boy this series has gone downhill huh?

    • VancouverGal profile image

      VancouverGal 7 years ago from Canada

      Great choices, everyone!

    • profile image

      Frank 7 years ago

      1 - The Bath Item Gift Hypothesis

      2 - The Euclid Alternative (Sheldon Driving)

      3 - The Adhesive Duck Deficiency (Sheldon Driving Again)

      4 - The Cornhusker Vortex (Football)

      5 - Monkey Business

    • profile image

      Rocky 7 years ago

      Episode 10 from season 3: The Gorilla Experiment is in my opnion the best episode of all 4 seasons. Howard is playing the cool guy while sheldon is making fun of him =>


    • profile image

      kripke 7 years ago

      i like the episode where in sheldon is on a driving lesson!!!

      and the episode when he dot sick!!!!!!!!!!

    • profile image

      Johnny 7 years ago

      funniest episode is season 2 episode 1 " the bad fish paradigm" where sheldon has to keep a secret for leonard and goes to raj's and howard's and then howard drug sheldon its hilarious

    • VancouverGal profile image

      VancouverGal 7 years ago from Canada

      This show is wonderfully written! And until this season, we never had any smidge of evidence that Sheldon might be able to love us back!

    • Broke Bloak profile image

      Broke Bloak 7 years ago

      I just got into this series, FUNNY!! I totally have a crush on Sheldon!

    • VancouverGal profile image

      VancouverGal 7 years ago from Canada

      I'm waiting to see what happens with Leonard and Penny this season!

    • profile image

      panicmoon 7 years ago

      i love the season 3 leonard/penny episodes


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