1. The Electric Can Opener Fluctuation
Air date: 2009-09-21 · 30 min
Sheldon flees back to Texas in disgrace when he learns the guys tampered with his arctic expedition data, forcing the guys to follow him and threatening Leonard's hopes for a romantic encounter with Penny.
Open episode 1 ↗2. The Jiminy Conjecture
Air date: 2009-09-28 · 30 min
Leonard and Penny struggle to recover from an awkward first hookup while Sheldon and Howard stake their best comic books on a bet to determine the species of a cricket.
Open episode 2 ↗3. The Gothowitz Deviation
Air date: 2009-10-05 · 30 min
Howard and Raj visit a Goth nightclub to pick up women while Sheldon attempts to build a better Penny using chocolate-based behavior modification.
Open episode 3 ↗4. The Pirate Solution
Air date: 2009-10-12 · 30 min
Raj must find a new job or be sent back to India, but Sheldon has a solution, which leaves Leonard and Penny dealing with Howard as third wheel.
Open episode 4 ↗5. The Creepy Candy Coating Corollary
Air date: 2009-10-19 · 30 min
While Sheldon settles a score with his nemesis, Wil Wheaton, Wolowitz begs Leonard to get Penny to set him up with one of her friends.
Open episode 5 ↗6. The Cornhusker Vortex
Air date: 2009-11-02 · 30 min
Sheldon teaches Leonard how to understand football while a kite-fighting incident threatens Howard and Raj's friendship.
Open episode 6 ↗7. The Guitarist Amplification
Air date: 2009-11-09 · 30 min
An argument between Leonard and Penny proves "inconvenient" to Sheldon.
Open episode 7 ↗8. The Adhesive Duck Deficiency
Air date: 2009-11-16 · 30 min
With Leonard, Howard and Raj away camping in the desert, an injured Penny has only Sheldon to rely on.
Open episode 8 ↗9. The Vengeance Formulation
Air date: 2009-11-23 · 30 min
After he's humiliated on National Public Radio, Sheldon vows to destroy Kripke, while Wolowitz tries not to destroy his new relationship with Bernadette.
Open episode 9 ↗10. The Gorilla Experiment
Air date: 2009-12-07 · 30 min
Sheldon attempts to help Penny understand Leonard's work, and Wolowitz becomes jealous when Leonard starts hanging out with his new girlfriend.
Open episode 10 ↗11. The Maternal Congruence
Air date: 2009-12-14 · 30 min
Visit from Leonard's mother delights Sheldon and horrifies Leonard.
Open episode 11 ↗12. The Psychic Vortex
Air date: 2010-01-11 · 30 min
While Sheldon and Koothrappali attend a university mixer, Leonard is upset to discover that Penny believes in psychics.
Open episode 12 ↗13. The Bozeman Reaction
Air date: 2010-01-18 · 30 min
When their apartment is robbed, Leonard and Sheldon turn to their friends to create a state-of-the-art security system.
Open episode 13 ↗14. The Einstein Approximation
Air date: 2010-02-01 · 30 min
Sheldon's search for the answer to a physics problem leads him to work at the Cheesecake Factory with Penny.
Open episode 14 ↗15. The Large Hadron Collision
Air date: 2010-02-08 · 30 min
Leonard can only bring one guest on a trip to see CERN's Large Hadron Collider in Switzerland on Valentine's Day.
Open episode 15 ↗16. The Excelsior Acquisition
Air date: 2010-03-01 · 30 min
Sheldon winds up in traffic court when he gets a ticket because of Penny.
Open episode 16 ↗17. The Precious Fragmentation
Air date: 2010-03-08 · 30 min
When the guys find a ring from "The Lord of the Rings" at a garage sale, it threatens to tear them apart.
Open episode 17 ↗18. The Pants Alternative
Air date: 2010-03-22 · 30 min
Sheldon's friends come to his aid when his fear of public speaking stands between him and a coveted award.
Open episode 18 ↗19. The Wheaton Recurrence
Air date: 2010-04-12 · 30 min
Fight between Leonard and Penny threatens their relationship, while Sheldon battles Wil Wheaton in bowling.
Open episode 19 ↗20. The Spaghetti Catalyst
Air date: 2010-05-03 · 30 min
When Leonard and Penny aren't speaking, Sheldon goes to extremes to keep them both happy.
Open episode 20 ↗21. The Plimpton Stimulation
Air date: 2010-05-10 · 30 min
Leonard and Sheldon compete for the attention of a famous female physicist.
Open episode 21 ↗22. The Staircase Implementation
Air date: 2010-05-17 · 30 min
Leonard tells Penny about how he met Sheldon for the first time...and what happened to the elevator.
Open episode 22 ↗23. The Lunar Excitation
Air date: 2010-05-24 · 30 min
While Penny worries that dating Leonard has ruined her for normal guys, Wolowitz and Koothrappali search for Sheldon's perfect match online.
Open episode 23 ↗