<Tr> <Td_colspan="2"> Next → Season 2 </Td> </Tr> <Tr> <Td_colspan="2"> List of The Big Bang Theory episodes </Td> </Tr> <P> The first season of the American sitcom The Big Bang Theory was originally aired on CBS from September 24, 2007, to May 19, 2008, over 17 episodes . An unaired pilot also exists . The Season 1 DVD came without a gag reel and is, so far, the only Big Bang Theory DVD set not to have one . The reissued Blu - ray, was released July 10, 2012, and includes a gag reel that is exclusive to the set . The episodes on Blu - ray are all in remastered surround sound, whereas the DVD version had stereo . Two of the main cast, Sheldon and Leonard, are named after actor, director, and producer Sheldon Leonard . </P> <P> Johnny Galecki and Sara Gilbert both selected the episode "The Hamburger Postulate" as a Primetime Emmy Award submission for Outstanding Lead Actor in a Comedy Series and Outstanding Guest Actress in a Comedy Series, respectively, at the 60th Primetime Emmy Awards, but both ended up not receiving a nomination . Jim Parsons selected the episode "The Pancake Batter Anomaly" as a Primetime Emmy Award submission for Outstanding Lead Actor in a Comedy Series at the 60th Primetime Emmy Awards, but ended up not receiving a nomination . </P>

When was the first episode of the big bang theory aired