Season 3 from the hilarious comedy series aired from 2009-2010 and includes 23 episodes:
1 - The electrical Can Opener Fluctuation (9/21/09) - Sheldon returns home to Texas when he discovers that his roommates altered the outcomes of his Arctic research study.
2 - The Jiminy Conjecture (9/28/09) - Leonard and Penny attempt a romantic evening while Sheldon and Howard bet comic books on the species of crickets.
3 - The Gothowitz Deviation (10/5/09)- Howard and Raj go to a Goth bar while Sheldon uses chocolate on Penny to demonstrate to Leonard the power of behavior modification.
4 - The Pirate Solution (10/12/09) - Raj requires a job in which to stay the US and considers working for Sheldon.
5 - The Creepy Candy Coating Corollary (10/19/09) - Sheldon meets track of Wil Wheaton, a Star Trek actor he doesn't care for.
6 - The Cornhusker Vortex (11/2/09) - Leonard attempts to fit in with Penny's football loving fans.
7 - The Guitarist Amplification (11/9/09) - Leonard and Penny enter a big fight which unsettles Sheldon.
8 - The Adhesive Duck Deficiency (11/16/09) - The people continue an outdoor camping trip to observe a meteor shower.
9 - The Vengeance Formulation (11/23/09) - Barry Kripke plays a practical joke on Sheldon when he appears with an NPR program.
10 - The Gorilla Experiment (12/7/09) - Penny wants to understand Leonard's work so she seeks tutoring from Sheldon.
11 - The Maternal Congruence (12/14/09) - Leonard's mother visits and he fears what her opinion of Penny is going to be.
12 - The Psychic Vortex (1/11/10) - Penny believes in psychics which unsettles Leonard.
13 - The Bozeman Reaction (1/18/10) - Leonard and Sheldon devise a security system after their apartment is robbed.
14 - The Einstein Approximation (2/1/10) - Sheldon's dilemma to freeing his mental block involves working for Penny at The Cheesecake Factory.
15 - The big Hadron Collision (2/8/10) - Leonard must choose from Penny and Sheldon when he gets an invitation to Switzerland to go to a conference.
16 - The Excelsior Acquisition (3/1/10) - Sheldon has to appear in traffic court on the day that Stan Lee is appearing at the comic book store.
17 - The valuable Fragmentation (3/8/10) - A prop ring from "The Lord from the Rings" turns the guys relationships upside down.
18 - The Pants Alternative (3/22/2010) - Sheldon has to accept an award but includes a big anxiety about speaking in public.
19 - The Wheaton Recurrence (4/12/2010) - Sheldon competes against his nemesis Wil Wheaton in a bowling tournament.
20 - The Spaghetti Catalyst (5/3/2010) - Sheldon includes a spaghetti dinner with Penny but doesn't want the people to understand it.
21 - The Plimpton Stimulation (5/10/2010) - An amorous female physicist riles up the boys.
22 - The Staircase Implementation (5/17/2010) - Sheldon recalls the time when he and Leonard became roommates.
23 - The Lunar Excitation (5/24/2010) - Howard and Raj find Sheldon to start dating ? on an Online dating site.
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