Season 4 poster
The Big Bang Theory

Season 4

This season the Big Bang gang’s romantic universe expands. On the rebound from Penny, Leonard falls into the arms of Raj’s sister Priya. Sheldon gets a girlfriend, or rather a friend who is a girl: Amy, a dour neurobiologist who declares herself besties with Penny. Howard and Bernadette heat up. And so do Raj and Bernadette (at least in Raj’s Bollywood daydream).

Air dateSep 23, 2010
Episodes24

Episodes

  1. 1. The Robotic Manipulation Sep 23, 2010 · 21 min · ★ 8.0
  2. 2. The Cruciferous Vegetable Amplification Sep 30, 2010 · 21 min · ★ 7.7
  3. 3. The Zazzy Substitution Oct 7, 2010 · 21 min · ★ 7.5
  4. 4. The Hot Troll Deviation Oct 14, 2010 · 20 min · ★ 7.6
  5. 5. The Desperation Emanation Oct 21, 2010 · 21 min · ★ 7.3
  6. 6. The Irish Pub Formulation Oct 28, 2010 · 22 min · ★ 7.5
  7. 7. The Apology Insufficiency Nov 4, 2010 · 21 min · ★ 7.5
  8. 8. The 21-Second Excitation Nov 11, 2010 · 19 min · ★ 7.7
  9. 9. The Boyfriend Complexity Nov 18, 2010 · 21 min · ★ 7.9
  10. 10. The Alien Parasite Hypothesis Dec 9, 2010 · 20 min · ★ 7.4
  11. 11. The Justice League Recombination Dec 16, 2010 · 20 min · ★ 8.0
  12. 12. The Bus Pants Utilization Jan 6, 2011 · 21 min · ★ 7.4
  13. 13. The Love Car Displacement Jan 20, 2011 · 21 min · ★ 7.7
  14. 14. The Thespian Catalyst Feb 3, 2011 · 21 min · ★ 7.5
  15. 15. The Benefactor Factor Feb 10, 2011 · 20 min · ★ 7.4
  16. 16. The Cohabitation Formulation Feb 17, 2011 · 20 min · ★ 7.5
  17. 17. The Toast Derivation Feb 24, 2011 · 21 min · ★ 7.6
  18. 18. The Prestidigitation Approximation Mar 10, 2011 · 21 min · ★ 7.6
  19. 19. The Zarnecki Incursion Mar 31, 2011 · 21 min · ★ 7.6
  20. 20. The Herb Garden Germination Apr 7, 2011 · 21 min · ★ 7.9
  21. 21. The Agreement Dissection Apr 28, 2011 · 21 min · ★ 7.4
  22. 22. The Wildebeest Implementation May 5, 2011 · 21 min · ★ 7.1
  23. 23. The Engagement Reaction May 12, 2011 · 20 min · ★ 7.6
  24. 24. The Roommate Transmogrification May 19, 2011 · 21 min · ★ 7.6