1. The Bad Fish Paradigm
Aired: Sep 22, 2008 Leonard becomes concerned when his date with Penny ends abruptly and she star...
2. The Codpiece Topology
Aired: Sep 29, 2008 Sheldon is annoyed when Leonard turns to Leslie for comfort after seeing Penn...
3. The Barbarian Sublimation
Aired: Oct 6, 2008 Sheldon introduces Penny to online gaming, however she refuses to quit after ...
4. The Griffin Equivalency
Aired: Oct 13, 2008 The guys struggle to cope with Raj's arrogance after he is featured in a Peop...
5. The Euclid Alternative
Aired: Oct 20, 2008 Sheldon annoys the gang when Leonard can't drive him to and from work, so the...
6. The Cooper-Nowitzki Theorem
Aired: Nov 3, 2008 Sheldon is flattered when a graduate student takes a shine to him, however he...
7. The Panty Piñata Polarization
Aired: Nov 10, 2008 Penny plans revenge when Sheldon bans her from his and Leonard's apartment, w...
8. The Lizard-Spock Expansion
Aired: Nov 17, 2008 Leonard and Howard's friendship is jeopardised when Leonard steals a girl fro...
9. The White Asparagus Triangulation
Aired: Nov 24, 2008 Sheldon believes that Leonard will wreck his relationship with Stephanie, so ...
10. The Vartabedian Conundrum
Aired: Dec 8, 2008 Leonard tries to slow down his relationship with Stephanie when he realizes t...
11. The Bath Item Gift Hypothesis
Aired: Dec 15, 2008 Leonard is disappointed when Penny develops an interest in an attractive phys...
12. The Killer Robot Instability
Aired: Jan 12, 2009 Howard becomes depressed after Penny makes a cruel statement about his love l...
13. The Friendship Algorithm
Aired: Jan 19, 2009 Sheldon tries to make friends with Kripke in the hope that it will get him ac...
14. The Financial Permeability
Aired: Feb 2, 2009 Leonard and Sheldon try to help out Penny when she can't afford to pay her rent.
15. The Maternal Capacitance
Aired: Feb 9, 2009 Sheldon hits it off with Leonard's psychoanalyst mother, but she drives Leona...
16. The Cushion Saturation
Aired: Mar 2, 2009 Howard hooks up with Leslie, while Penny accidentally ruins Sheldon's spot on...
17. The Terminator Decoupling
Aired: Mar 9, 2009 On a train to San Francisco, Howard, Raj and Leonard fight for the affections...
18. The Work Song Nanocluster
Aired: Mar 16, 2009 Sheldon's assistance with Penny's home-based business leads to chaos.
19. The Dead Hooker Juxtaposition
Aired: Mar 30, 2009 Penny becomes jealous when a gorgeous new neighbor attracts the guys' attention.
20. The Hofstadter Isotope
Aired: Apr 13, 2009 Leonard is upset when the owner of the comic book store goes on a date with P...
21. The Vegas Renormalization
Aired: Apr 27, 2009 After being dumped by Leslie, Howard heads to Las Vegas with Leonard and Raj....
22. The Classified Materials Turbulence
Aired: May 4, 2009 Penny's second date with Stuart has significant implications for Leonard. How...
23. The Monopolar Expedition
Aired: May 11, 2009 Penny gets upset when she finds out Leonard and the guys plan to work at the ...