September 27th 2012 to May 16th 2013
Yes, there will be a season 6 of The Big Bang Theory, but there is not yet an air date.
Spring of 2010
Season 3 premiered on September 21, 2009
January 12th 2012
September 21st 2009 to May 24th 2010
September 23rd 2010 to May 19th 2011
If you mean out on the air, it is all ready finished. If you mean on DVD, then it will come out soon.
I'm not sure, I know it's out in america on the 27th, but if it does the same as e4 done with season 5 it should be out on November the 8th
I'm guessing sometime soon, if it already hasn't. It started one week ago here in America!
In Canada and the United States and maybe other places.
The similarity of spraying air freshener to the Big Bang is not very striking, however, both the universe, and the cloud of air freshener, originate in a small location and then expand outward.
Big Bang Theory airs new episodes on CBS Monday nights at 8pm from late September to mid May with various breaks in the season. Syndicated episodes air at various times throughout America (& I presume internationally). You'll have to check your local listings for times and channels.