Episode Guide: The Big Bang Theory' - Season Four

Big Bang Theory4-01 The Robotic Manipulation--09/23/2010
Penny finds herself along for the ride on Sheldon's first date ever; while Wolowitz finds a new use for a robotic arm.
Story by: Chuck Lorre & Lee Aronsohn & Dave Goetsch
Telepay by: Steven Molaro & Eric Kaplan & Steve Holland
Directed by: Mark Cendrowski
Guest stars:Carol Ann Susi as Mrs. Wolowitz; Mayim Bialik as Amy Fowler and Vernea Watson as Althea

4-02 The Cruciferous Vegetable Amplification--09/30/2010
Sheldon realizes he won't live long enough to download his consciousness into a robot body, and attempts to extend his lifespan.
Story by: Bill Prady & Lee Aronsohn & Steve Holland
Directed by: Chuck Lorre & Steven Molaro & Jim Reynolds
Guest stars: Steve Wozniak as Himself

4-03 The Zazzy Substitution--10/07/2010

4-04 The Hot Troll Deviation--10/14/2010

4-05 The Desperation Emanation--10/21/2010

4-06 The Irish Pub Formulation--10/28/2010

4-07 The Apology Insufficiency--11/04/2010

4-08 The 21-second Excitation--11/11/2010

4-09 The Boyfriend Complexity--11/18/2010

4-10 The Alien Parasite Hypothesis--12/09/2010

4-11 The Justice League Recombination--12/16/2010

4-12 The Bus Pants Utilization--01/06/2011

4-13 The Love Car Displacement--01/20/2011

4-14 The Thespian Catalyst--03/03/2011

4-15 The Benefactor Factor--02/10/2011

4-16 The Cohabitation Formulation--02/17/2011

4-17 The Toast Derivation--02/24/2011

4-18 The Prestidigitation Approximation--03/10/2011

4-19 The Zarnecki Incursion--03/31/2011

4-20 The Herb Garden Germination--04/07/2011

4-21 The Agreement Dissection--04/28/2011

4-22 The Wildebeest Implementation--05/05/2011

4-23 The Engagement Reaction--05/12/2011

4-24 The Roommate Transmogrification--05/19/2011