Howard return from space and adjust to normal, married life on earth. Sheldon and Amy's unique relationship continues to progress, though at a slower pace than Amy wants. Leonard and Penny's relationship is business as usual, with Leonard once again proposing to Penny. Meanwhile, Raj finally meets a girl and enters a (somewhat) stable relationship, the demise of which leads to unexpected progress for Raj.
S06E01 The Date Night Variable
Sep 27, 2012With 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.
30m
S06E02 The Decoupling Fluctuation
Oct 4, 2012When Sheldon learns that Penny is thinking about breaking up with Leonard, he tries to intervene. Meanwhile, in space, the other astronauts pick on Howard.
30m
S06E03 The Higgs Boson Observation
Oct 11, 2012Amy feels threatened when Sheldon hires a young female assistant, and the pressure of being in space takes its toll on Wolowitz.
30m
S06E04 The Re-Entry Minimization
Oct 18, 2012When Wolowitz returns from space, he doesn't get the hero's welcome he expected. Meanwhile, Game Night turns into a battle of the sexes.
30m
S06E05 The Holographic Excitation
Oct 25, 2012The gang celebrates Halloween at Stuart's comic book store. Meanwhile, Leonard seduces Penny with science.
30m
S06E06 The Extract Obliteration
Nov 1, 2012Sheldon'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.
30m
S06E07 The Habitation Configuration
Nov 8, 2012Wolowitz struggles with moving out of his mother's house. Meanwhile, Sheldon is caught in the middle of an argument between Amy and Wil Wheaton.
30m
S06E08 The 43 Peculiarity
Nov 15, 2012Howard 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.
30m
S06E09 The Parking Spot Escalation
Nov 29, 2012When the University reassigns Sheldon's parking spot to Wolowitz, their fight affects the whole gang.
30m
S06E10 The Fish Guts Displacement
Dec 6, 2012Sheldon tries to nurse a sick Amy back to health, while Wolowitz prepares for an upcoming fishing trip with his father-in-law.
30m
S06E11 The Santa Simulation
Dec 13, 2012Sheldon 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.
30m
S06E12 The Egg Salad Equivalency
Jan 3, 2013Sheldon gets accused of sexual harassment at the University and winds up getting Leonard, Raj and Wolowitz in trouble.
30m
S06E13 The Bakersfield Expedition
Jan 10, 2013While 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.
30m
S06E14 The Cooper/Kripke Inversion
Jan 31, 2013Sheldon 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.
30m
S06E15 The Spoiler Alert Segmentation
Feb 7, 2013When Sheldon and Leonard fight, it affects Penny and Amy's living arrangements. Meanwhile, Raj takes care of Mrs. Wolowitz while Howard is away.
30m
S06E16 The Tangible Affection Proof
Feb 14, 2013While 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.
30m
S06E17 The Monster Isolation
Feb 21, 2013After a terrible date, Koothrappali vows to never leave his apartment. Meanwhile, Penny actually impresses Sheldon with her acting skills.
30m
S06E18 The Contractual Obligation Implementation
Mar 7, 2013Leonard, Sheldon and Wolowitz speak to junior high girls about careers in science. Meanwhile, Koothrappali plans a date with Lucy.
30m
S06E19 The Closet Reconfiguration
Mar 14, 2013Howard 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.
30m
S06E20 The Tenure Turbulence
Apr 4, 2013Leonard, Sheldon and Raj fight for tenure at the University, and the competition heats up when the girls get involved.
30m
S06E21 The Closure Alternative
Apr 25, 2013Sheldon 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.
30m
S06E22 The Proton Resurgence
May 2, 2013Sheldon 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.
30m
S06E23 The Love Spell Potential
May 9, 2013When 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.
30m
S06E24 The Bon Voyage Reaction
May 16, 2013New success for Leonard makes Sheldon very jealous and throws Penny for a loop. Meanwhile, Koothrappali pushes Lucy too far in their relationship.
30m
