1. The Robotic Manipulation

Howard uses a robotic arm for his own pleasure. Sheldon goes on a date with Amy ... More

2. The Cruciferous Vegetable Amplification

Sheldon calculates that he'll be dead before technology exists to download his c... More

3. The Zazzy Substitution

Sheldon breaks up with Amy Farrah Fowler, and the guys worry when he starts repl... More

4. The Hot Troll Deviation

Wolowitz is embarrassed when a secret of his is revealed, and Sheldon and Raj ba... More

5. The Desperation Emanation

Sheldon meets Amy's mom and comes to the realization he no longer wants to see A... More

6. The Irish Pub Formulation

When Raj's sister has a one-day layover, he forbids the others from hooking up w... More

7. The Apology Insufficiency

The rest of the gang is interviewed by the FBI for Wolowitz's security clearance... More

8. The 21-Second Excitation

The guys camp out to see a print of Raiders of the Lost Ark with 21 extra second... More

9. The Boyfriend Complexity

Penny asks Leonard to lie to her visiting father, while Howard, Raj and Bernadet... More

10. The Alien Parasite Hypothesis

Amy crushes on one of Penny's dim ex-boyfriends, Zack. Raj and Wolowitz argue ov... More

11. The Justice League Recombination

The guys get Zack and Penny to join their Justice League costume for a New Year'... More

12. The Bus Pants Utilization

Their friendship becomes strained when Sheldon tries to take over Leonard's crea... More

13. The Love Car Displacement

Howard is jealous when Bernadette runs into her old boyfriend at a science event... More

14. The Thespian Catalyst

Sheldon wants acting lessons from Penny, hoping they will make him a better teacher.

15. The Benefactor Factor

After meeting at a fundraising gala, an aged but wealthy Caltech donor makes Leo... More

16. The Cohabitation Formulation

Howard contemplates a serious decision in his relationship with Bernadette, and ... More

17. The Toast Derivation

Sheldon is in a crisis when he realizes he's not the epicenter of the group, so ... More

18. The Prestidigitation Approximation

Leonard has a tough choice to make when Priya asks him to stop spending time wit... More

19. The Zarnecki Incursion

The guys become sleuths to find out who hacked Sheldon's online-game account.

20. The Herb Garden Germination

Sheldon and Amy decide to start rumors about themselves as a social test. Howard... More

21. The Agreement Dissection

Priya uses her legal expertise to rip apart Sheldon's roommate agreement, and th... More

22. The Wildebeest Implementation

Raj makes an attempt to cure his phobia of talking to women, and Penny spies on ... More

23. The Engagement Reaction

Mrs. Wolowitz ends up in the hospital after Howard tells her he's marrying Berna... More

24. The Roommate Transmogrification

Raj moves in with Sheldon, and the guys tease Howard when Bernadette gets her Ph... More