The Big Bang Theory
Season 2
September 22, 2008
23Episodes
7.6
This season, Leonard gets a girl. So does Sheldon. Howard drives the Mars Rover into a ditch. Raj woos a terminator. Gorgeous girl-next-door Penny falls under the spell of Age of Conan. And super-smart, ueberconfident Leslie Winkler reduces mere men to spineless jellyfish.
Episodes
1. The Bad Fish Paradigm
7.8
September 22, 2008
22 min
Penny's first date with Leonard goes awry; Penny finds Sheldon to be an unwilling confidant.
Guest Stars:
Carol Ann Susi
2. The Codpiece Topology
7.5
September 29, 2008
21 min
A jealous Leonard reacts to Penny's new guy by rebounding with Leslie.
Guest Stars:
Sara Gilbert, Travis Schuldt
3. The Barbarian Sublimation
7.8
October 6, 2008
21 min
Sheldon creates a monster when he introduces Penny to online gaming.
Guest Stars:
Sara Gilbert, Mark Harelik, Tyler Jon Olson, Mark Hames
4. The Griffin Equivalency
7.5
October 13, 2008
21 min
Raj gets an inflated ego and makes a play for Penny after being referenced in a magazine article.
Guest Stars:
Alice Amter, Brian George, Mark Harelik, Charlie Sheen
5. The Euclid Alternative
7.5
October 20, 2008
20 min
Leonard and his friends stage an intervention to force Sheldon to face his fear of driving.
Guest Stars:
Octavia Spencer, Elena Campbell-Martinez, Livia Treviño
6. The Cooper-Nowitzki Theorem
7.8
November 3, 2008
21 min
Sheldon and the gang are confused when a young grad student is attracted to him.
Guest Stars:
Sara Gilbert, Riki Lindhome, Emily Happe
7. The Panty Piñata Polarization
7.9
November 10, 2008
21 min
When Sheldon bans Penny from the apartment for numerous minor infractions, she decides to retaliate.
Guest Stars:
Lio Tipton, Samantha Potter
8. The Lizard-Spock Expansion
7.4
November 17, 2008
20 min
Leonard inadvertently steals away the new woman Wolowitz thinks is the love of his life.
Guest Stars:
Carol Ann Susi, Robert Clotworthy, Sara Rue, Jennifer Hale
9. The White Asparagus Triangulation
7.3
November 24, 2008
21 min
Sheldon is thrilled when Leonard starts dating a woman who meets Sheldon's stringent standards.
Guest Stars:
Sara Rue
10. The Vartabedian Conundrum
6.9
December 8, 2008
21 min
Leonard asks Penny for advice when his new relationship starts moving too fast.
Guest Stars:
Sara Rue
11. The Bath Item Gift Hypothesis
8.2
December 15, 2008
21 min
Penny starts dating Leonard's handsome colleague; Leonard and his friends are tortured by Sheldon's obsession with gift-giving etiquette.
Guest Stars:
Michael Trucco, Michael Hyatt
12. The Killer Robot Instability
7.5
January 12, 2009
21 min
Penny's criticism of Wolowitz's romantic life pushes him into depression and AWOL for a fighting robot battle the rest of guys are depending on him for.
Guest Stars:
John Ross Bowie, Carol Ann Susi
13. The Friendship Algorithm
7.5
January 19, 2009
21 min
Sheldon creates a scientific procedure for making friends.
Guest Stars:
John Ross Bowie, Will Deutsch, Jane Galloway Heitz, Jade Zdanow
14. The Financial Permeability
7.4
February 2, 2009
21 min
Sheldon's solution to Penny's financial difficulty leads to a confrontation between Leonard and Penny's ex-boyfriend.
Guest Stars:
Brian Patrick Wade
15. The Maternal Capacitance
8.2
February 9, 2009
21 min
Leonard and Penny are drawn together after a disastrous visit from Leonard's mother.
Guest Stars:
Christine Baranski
16. The Cushion Saturation
7.5
March 2, 2009
21 min
A paintball game leads to a fight between Sheldon and Penny, and romance for Leslie and Wolowitz.
Guest Stars:
Sara Gilbert, Carol Ann Susi
17. The Terminator Decoupling
7.5
March 9, 2009
21 min
Leonard, Sheldon and Wolowitz are ecstatic to learn that a famous science-fiction actress (Summer Glau) is on board the train they are taking to San Francisco.
Guest Stars:
Summer Glau, Robert Clotworthy, George F. Smoot
18. The Work Song Nanocluster
7.6
March 16, 2009
20 min
Penny's home business turns into a complete nightmare when Sheldon takes over.
19. The Dead Hooker Juxtaposition
7.6
March 30, 2009
20 min
Penny squares off with a new beautiful female neighbor who may become the building's "new Penny."
Guest Stars:
Valerie Azlynn, Carol Ann Susi
20. The Hofstadter Isotope
7.6
April 13, 2009
20 min
A fellow comic book enthusiast's hitting on Penny leads to Leonard and Howard going to a bar's Ladies' Night.
Guest Stars:
Kevin Sussman
21. The Vegas Renormalization
7.4
April 27, 2009
22 min
Leonard and Koothrappali escort a heartbroken Wolowitz to Las Vegas, and Sheldon becomes locked out of his apartment and must stay with Penny.
Guest Stars:
Jodi Lyn O'Keefe
22. The Classified Materials Turbulence
7.4
May 4, 2009
19 min
Penny's second date with Stuart sees her making a comment that gives Leonard new hope for a relationship with her. Wolowitz realizes there's a crucial error in a NASA project he's working on.
Guest Stars:
Kevin Sussman, Travis Davis, Robert Clotworthy
