![The Big Bang Theory Season 4 Episode 16 The Big Bang Theory Season 4 Episode 16](https://image.tmdb.org/t/p/w185/hM2TYCmOVXop1xhLA1Mbqyg60ze.jpg)
The Big Bang Theory Season 4 Episode 16
As Wolowitz contemplates taking things with Bernadette to the next level, Leonard rekindles his relationship with Raj’s sister.
Serie: The Big Bang Theory
Director: Mark Cendrowski
Guest Star: Aarti Mann, Carol Ann Susi, Mayim Bialik, Melissa Rauch