The Big Bang Theory
Physicists and best friends Leonard and Sheldon learn about the social aspects of life through their relationships with the free-spirited beauty who moves in next door.
The Conjugal Conjecture
S10 E1
The group struggles through an awkward morning after Sheldon's mother and Leonard's father spend an evening together; Penny's family arrives.
The Military Miniaturization
S10 E2
Wolowitz has a meeting with Colonel Williams, a representative from the Air Force Department of Material Command.
The Dependence Transcendence
S10 E3
Sheldon tries to stay awake with an energy drink as the gang races to finish its government project on time; Penny and Amy attend a gathering at Bert the Geologist's house; Koothrappali learns Bernadette's true feeling about her pregnancy.
The Cohabitation Experimentation
S10 E4
After her apartment floods, Amy suggests that she and Sheldon move in together; Koothrappali finds out the gender of Howard and Bernadette's baby before they do.
The Hot Tub Contamination
S10 E5
Things do not run smoothly when Amy moves in with Sheldon, and Leonard and Penny have to intervene; Howard and Bernadette find unexpected guests at their house when they decide to cancel their vacation plans.
The Fetal Kick Catalyst
S10 E6
Penny learns there are fans of her performance in "Serial Ape-ist" when she and Leonard attend a Comic Con event; Amy hosts a brunch at Penny's apartment; Wolowitz makes an impulsive purchase.
The Celebration Experimentation
S9 E17
For the first time in nine years, the gang celebrates Sheldon's birthday -- surprising him with a special guest.
The Application Deterioration
S9 E18
Leonard, Sheldon and Wolowitz file for a patent on their new invention; Penny, Amy and Bernadette give dating advice to Koothrappali after his breakup with Emily.
The Big Bear Precipitation
S9 E20
Sheldon shares a secret about Leonard when the two go on a weekend trip with Penny and Amy; Koothrappali goes all out with pregnancy gifts.
The Viewing Party Combustion
S9 E21
During a group get-together, a minor argument between Sheldon and Leonard turns into a heated debate, leaving the rest of the gang to choose sides.
The Fermentation Bifurcation
S9 E22
The gang runs into Penny's old boyfriend while out at a wine bar; Bernadette spends an evening with Sheldon; Koothrappali's introduction of his new girlfriend doesn't go as planned.
The Line Substitution Solution
S9 E23
Sheldon wants to go to a movie screening, so he pays Stuart to spend the day with Amy; Penny has a difficult time connecting with Leonard's visiting mother.
The Convergence Convergence
S9 E24
Leonard's recently divorced parents and Sheldon's devoutly religious mother visit; when they are contacted about their guidance system, Wolowitz and Koothrappali think the government is after them.
The Re-Entry Minimization
S6 E4
Wolowitz's return from space isn't all he expected; game night becomes a gender war.
The Holographic Excitation
S6 E5
The gang heads to Stuart's comic book store to celebrate Halloween; Leonard uses science to seduce Penny.
The Extract Obliteration
S6 E6
A game threatens Sheldon's relationship with Stephen Hawking; Penny secretly signs up for a college class.
The Habitation Configuration
S6 E7
Bernadette wants Wolowitz to move out of his mom's house; Sheldon is caught in the middle of Amy and Wil Wheaton's argument.
The 43 Peculiarity
S6 E8
Raj and Howard try to figure out why Sheldon disappears at 2:45 every afternoon; jealousy arises in Penny and Leonard's relationship.
The Parking Spot Escalation
S6 E9
Sheldon and Wolowitz's fight over a parking spot at the university impacts the whole gang.
The Fish Guts Displacement
S6 E10
When Amy gets sick, Sheldon tries to nurse her back to health; Wolowitz and his father-in-law plan a fishing trip.
The Santa Simulation
S6 E11
During a game, Sheldon revisits Christmas memories; Amy, Penny and Bernadette look for a date for Koothrappali.
The Egg Salad Equivalency
S6 E12
When Sheldon is accused of sexual harassment, he ends up getting Raj, Leonard and Wolowitz in trouble.
The Cooper/Kripke Inversion
S6 E14
Sheldon faces a crisis of confidence when he is forced to work with his nemesis, Barry Kripke; Raj and Howard buy expensive action figures of themselves.
The Spoiler Alert Segmentation
S6 E15
A fight between Sheldon and Leonard impacts Amy and Penny's living arrangements; while Howard is away, Raj helps Mrs. Wolowitz out.
The Tangible Affection Proof
S6 E16
The guys search for a perfect Valentine's Day gift for their significant others; Stuart and Raj host a "lonely people" party at the comic book store.
The Monster Isolation
S6 E17
After a bad date, Koothrappali decides to never leave his apartment; Penny's acting skills impress Sheldon.