"the Big Bang Theory" Pilot(2007) -

: The unaired pilot featured a female scientist named Gilda (Iris Bahr) instead of Howard and Raj. Creators Chuck Lorre and Bill Prady added Howard Wolowitz and Raj Koothrappali for the aired version to balance the group dynamic.

The series originally shot a pilot in 2006 that was significantly different from the version that premiered on September 24, 2007. "The Big Bang Theory" Pilot(2007)

: The original theme was "She Blinded Me with Science" by Thomas Dolby, which was later replaced by the iconic theme by the Barenaked Ladies . Key Scientific and Linguistic Themes : The unaired pilot featured a female scientist