Melissa Rauch and Mayim Bialik auditioned and were promoted to the main cast during this season as Dr. Bernadette Rostenkowski and Dr. Amy Farrah Fowler, respectively.

Raj and Sheldon clash over a desk. Sheldon is scared that he is in a relationship when Amy asks him to meet her mother, and Leonard asks Howard and Bernadette to set him up because he …

Season 4 of The Big Bang Theory returned to television on September 23, 2010, and contained 24 episodes. Throughout the season, both Sheldon and Howard become more involved in …

May 12, 2016 · Season 4 guide for The Big Bang Theory TV series - see the episodes list with schedule and episode summary. Track The Big Bang Theory season 4 episodes.

Sep 23, 2010 · Looking to watch The Big Bang Theory? Find out where to watch The Big Bang Theory from Season 4 at TV Guide

A printable Episode Guide for Season 4: a handy overview of all of the show's episodes

Complete episode list, ratings, and streaming details for The Big Bang Theory Season 4.

During the course of the series, 279 episodes of The Big Bang Theory aired, between September 24, 2007, and May 16, 2019. All seasons and episodes have been released on DVD, Blu-ray, …

Leonard is disappointed when Penny develops an interest in an attractive physicist at the university. Meanwhile, Sheldon struggles to find an appropriate Christmas gift for Penny. A …

"The Benefactor Factor" is the fifteenth episode of the fourth season of the American sitcom The Big Bang Theory. This episode first aired on Thursday, February 10, 2011.