Season 6

1. S06E01

   The Date Night Variable

   2012-09-27

   With his friends on dates, Raj must face his loneliness. Also, Wolowitz is caught in an argument between Bernadette and his mom, even while he's in space.

2. S06E02

   The Decoupling Fluctuation

   2012-10-04

   When Sheldon learns that Penny is thinking about breaking up with Leonard, he tries to intervene. Meanwhile, in space, the other astronauts pick on Howard.

3. S06E03

   The Higgs Boson Observation

   2012-10-11

   Amy feels threatened when Sheldon hires a young female assistant, and the pressure of being in space takes its toll on Wolowitz.

4. S06E04

   The Re-Entry Minimization

   2012-10-18

   When Wolowitz returns from space, he doesn't get the hero's welcome he expected. Meanwhile, Game Night turns into a battle of the sexes.

5. S06E05

   The Holographic Excitation

   2012-10-25

   The gang celebrates Halloween at Stuart's comic book store. Meanwhile, Leonard seduces Penny with science.

6. S06E06

   The Extract Obliteration

   2012-11-01

   Sheldon's relationship with Stephen Hawking is threatened over a game of "Words with Friends," and Penny secretly enrolls in a class at the local college.

7. S06E07

   The Habitation Configuration

   2012-11-08

   Wolowitz struggles with moving out of his mother's house. Meanwhile, Sheldon is caught in the middle of an argument between Amy and Wil Wheaton.

8. S06E08

   The 43 Peculiarity

   2012-11-15

   Howard and Raj try to get to the bottom of why Sheldon disappears every afternoon at 2:45. Meanwhile, Leonard and Penny deal with jealousy in their relationship.

9. S06E09

   The Parking Spot Escalation

   2012-11-29

   When the University reassigns Sheldon's parking spot to Wolowitz, their fight affects the whole gang.

10. S06E10

    The Fish Guts Displacement

    2012-12-06

    Sheldon tries to nurse a sick Amy back to health, while Wolowitz prepares for an upcoming fishing trip with his father-in-law.

11. S06E11

    The Santa Simulation

    2012-12-13

    Sheldon revisits some Christmas memories during a game of Dungeons and Dragons, while Penny, Bernadette and Amy try to find a girl for Koothrappali when he joins the girls for ladies' night.

12. S06E12

    The Egg Salad Equivalency

    2013-01-03

    Sheldon gets accused of sexual harassment at the University and winds up getting Leonard, Raj and Wolowitz in trouble.

13. S06E13

    The Bakersfield Expedition

    2013-01-10

    While the guys take a road trip to a comic book convention dressed as "Star Trek: The Next Generation" characters, the girls stay home and try to interpret a comic book.

14. S06E14

    The Cooper/Kripke Inversion

    2013-01-31

    Sheldon is forced to work with Barry Kripke and faces a crisis of confidence. Meanwhile, Howard and Raj spend $1,000 on action figures of themselves.

15. S06E15

    The Spoiler Alert Segmentation

    2013-02-07

    When Sheldon and Leonard fight, it affects Penny and Amy's living arrangements. Meanwhile, Raj takes care of Mrs. Wolowitz while Howard is away.

16. S06E16

    The Tangible Affection Proof

    2013-02-14

    While the guys try to give their significant others the perfect Valentine's Day, Raj and Stuart throw a "lonely people" party at the comic book store.

17. S06E17

    The Monster Isolation

    2013-02-21

    After a terrible date, Koothrappali vows to never leave his apartment. Meanwhile, Penny actually impresses Sheldon with her acting skills.

18. S06E18

    The Contractual Obligation Implementation

    2013-03-07

    Leonard, Sheldon and Wolowitz speak to junior high girls about careers in science. Meanwhile, Koothrappali plans a date with Lucy.

19. S06E19

    The Closet Reconfiguration

    2013-03-14

    Howard struggles with whether or not he should open a letter from his father, and Leonard and Penny throw a "grown-up" cocktail party at the apartment.

20. S06E20

    The Tenure Turbulence

    2013-04-04

    Leonard, Sheldon and Raj fight for tenure at the University, and the competition heats up when the girls get involved.

21. S06E21

    The Closure Alternative

    2013-04-25

    Sheldon feels lost after one of his favorite TV shows gets canceled too soon and Amy tries to help him get over his compulsive need for closure. Meanwhile, Raj discovers a secret about his new love interest, Lucy.

22. S06E22

    The Proton Resurgence

    2013-05-02

    Sheldon and Leonard hire Professor Proton, the host of their favorite childhood TV show, to perform. Also, Howard and Bernadette run into trouble babysitting Raj's dog.

23. S06E23

    The Love Spell Potential

    2013-05-09

    When the girls' trip to Vegas falls through, the guys invite them to play Dungeons & Dragons, causing Sheldon and Amy's relationship to take an unexpected turn. Meanwhile, Koothrappali and Lucy go on a very awkward date.

24. S06E24

    The Bon Voyage Reaction

    2013-05-16

    New success for Leonard makes Sheldon very jealous and throws Penny for a loop. Meanwhile, Koothrappali pushes Lucy too far in their relationship.

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