Search results
- Season 1
- Season 2
- Season 3
- Season 4
- Season 5
- Season 6
- Season 7
- Season 8
- Season 9
- Season 10
- Season 11
- Season 12
- Season 4 overviewSep 23, 2010-May 19, 201124 episodesSeason 4 episodes1. The Robotic Manipulation Sep 23, 2010
- Penny tags along on Sheldon's first date; Wolowitz finds a new use for a robotic arm.
- 2. The Cruciferous Vegetable Amplification Sep 30, 2010
- Sheldon realizes he will not live long enough to download his consciousness into a robot body.
- 3. The Zazzy Substitution Oct 7, 2010
- When Sheldon searches for an alternative to human companionship, the guys become concerned.
- 4. The Hot Troll Deviation Oct 14, 2010
- An embarrassing secret of Wolowitz's is revealed; Raj and Sheldon get into a war at work.
- 5. The Desperation Emanation Oct 21, 2010
- Leonard realizes he is the only one in his group without a girlfriend.
- 6. The Irish Pub Formulation Oct 28, 2010
- Leonard keeps an affair a secret from Sheldon, Howard and Raj.
- 7. The Apology Insufficiency Nov 4, 2010
- Sheldon's interview with the FBI jeopardizes Wolowitz's security clearance.
- 8. The 21-Second Excitation Nov 11, 2010
- The guys camp out for a movie screening; Penny and Bernadette invite Amy to her first slumber party.
- 9. The Boyfriend Complexity Nov 18, 2010
- Penny asks Leonard to lie to her father; an all-nighter at a telescope.
- 10. The Alien Parasite Hypothesis Dec 9, 2010
- Koothrappali and Wolowitz try to prove who would be a better superhero.
- 11. The Justice League Recombination Dec 16, 2010
- The guys try to bond with Penny's new boyfriend through a costume contest.
- 12. The Bus Pants Utilization Jan 6, 2011
- Leonard's idea for a smartphone application causes friction in his friendship with Sheldon.
- 13. The Love Car Displacement Jan 20, 2011
- Bernadette runs into her ex-boyfriend (Rick Fox) while attending a science event with Wolowitz.
- 14. The Thespian Catalyst Feb 3, 2011
- Sheldon takes acting lessons from Penny in hope of becoming a better teacher.
- 15. The Benefactor Factor Feb 10, 2011
- A wealthy donor makes Leonard question what he is willing to do for science.
- 16. The Cohabitation Formulation Feb 17, 2011
- Wolowitz considers taking things with Bernadette to the next level.
- 17. The Toast Derivation Feb 24, 2011
- Sheldon is upset when he realizes Leonard is the center of their group of friends.
- 18. The Prestidigitation Approximation Mar 10, 2011
- Leonard must choose between Penny and his new girlfriend, Priya.
- 19. The Zarnecki Incursion Mar 31, 2011
- The guys try to figure out who hacked Sheldon's online-game account.
- 20. The Herb Garden Germination Apr 7, 2011
- Howard decides to take a big step in his relationship with Bernadette.
- 21. The Agreement Dissection Apr 28, 2011
- Priya dissects the roommate agreement; the ladies take Sheldon dancing.
- 22. The Wildebeest Implementation May 5, 2011
- Raj tries to cure his social anxiety; Penny spies on Leonard and his girlfriend through Bernadette.
- 23. The Engagement Reaction May 12, 2011
- Howard's mom winds up in the hospital after hearing news of her son's engagement to Bernadette.
- 24. The Roommate Transmogrification May 19, 2011
- Bernadette gets her Ph.D., inspiring the guys to tease Wolowitz about his lack of a doctorate.