Timeline: The Big Bang Theory

May 1, 2006

The title card for the original 2006 pilot

The Original title card 1st pilot </a>The original unaired pilot has never been officially released, but it has circulated on the Internet.

May 14, 2007

Reworked 2nd pilot

The reworked second pilot led to a 13-episode order by CBS.retrieved from "CBS PICKS UP 'BANG,' 'POWER' PLUS FOUR DRAMAS". The Futon Critic. May 14, 2007.

Sep 24, 2007

First came out to the public

The Big Bang Theory first came out to the public by CBS.The show premiered and was picked-up for a full 22-episode season on October 19, 2007. Retrieved from:Retrieved from:The Big Bang Theory Cast & Details — TVGuide.com. 14, 2009.

Period: Sep 24, 2007 to May 19, 2008

Season 1

Rank #59
Avg. Viewers(in millions) 8.31

Period: Sep 22, 2008 to May 11, 2009

Season 2

Rank #44
Avg. Viewers(in millions) 10.00

Aug 2, 2009

The sitcom Won the best comedy series TCA award

The sitcom had won the best comedy series TCA award and Jim Parsons (Sheldon) had won the award for individual achievement in comedy.(CBS photos)Retrieved from:The TCA Awards turn 25 – Sepinwall on TV | New Jersey Entertainment — TV & Film. NJ.com. 2009-08-02

Sep 21, 2009

The third season premiered

When the third season premiered, The Big Bang Theory ranked as CBS's highest-rated show of that evening in the adults 18–49 demographic (4.6/10), along with a then-series-high 12.83 million viewers. Retrieved from:"CBS opens the new season with a big bang "The Big Bang Theory" Premieres with its largest audience ever and highest adult 18–49 rating". Cbspressexpress.com. Retrieved October 11, 2009.

Period: Sep 21, 2009 to May 24, 2010

Season 3

Rank #12
Avg. Viewers(in millions) 14.14

Apr 13, 2010

Parsons won a Primetime Emmy Award for Outstanding Lead Actor in a Comedy Series

The show had won the People's Choice Award for Favorite Comedy, while Parsons had won a Primetime Emmy Award for Outstanding Lead Actor in a Comedy Series. "61st Primetime Emmy Awards | Academy of Television Arts & Sciences". Cdn.emmys.tv. Retrieved January 30, 2010.

May 19, 2010

Changing the show time

It had announced that CBS would be moving the show to Thursdays at 8:00 ET for the 2010–2011 schedule. Retrieved from: James Hibberd. CBS shakes up fall schedule. The Hollywood Reporter. 2010-05-19

Period: Sep 23, 2010 to May 19, 2011

Season 4

Rank #15
Avg. Viewers(in millions) 13.14

Jan 12, 2011

The show had been renewed

CBS announced that the show had been renewed for an additional three years, extending it through the 2013–2014 season. (CBS photos)Retrieved from: "CBS and Warner Bros. Television Announce Multi-Year Broadcast Agreement for "The Big Bang Theory"". The Futon Critic. Retrieved January 12, 2011.

Jan 16, 2011

Golden Globe Award

Parsons was awarded a Golden Globe for Best Performance by an Actor in a Television Series – Comedy or Musical, an award that was presented by co-star Kaley Cuoco (Penny). (Photo from Google) Retrieved from: 2012 GOLDEN GLOBE AWARDS FOR THE YEAR ENDED DECEMBER 31, 2011

Sep 18, 2011

Parsons(Sheldon) awarded again!!!

Parsons(Sheldon) was again awarded an Emmy for Best Actor in a Comedy Series. Retrieved from: Photo credit: JPI Studios.

Sep 22, 2011

The fifth season had been premiered.

The fifth season had been premiered. And famous physician Stephen Hawking will turn up[Photo: Sonja Flemming](http://www.cbs.com/shows/big_bang_theory/photos/103797/the-hawking-excitation/103798)

Period: Sep 22, 2011 to May 10, 2012