List of The Big Bang Theory episodes

DThe following is a list of episodes of the CBS sitcom The Big Bang Theory.

Like the name of the series itself, with the exception of the first episode – "Pilot" – episode titles of The Big Bang Theory always start with "The", and resemble the name of a, or , whimsically referencing a plot point, script line or quirk in the episode. The writers have used 112 different scientific terms in the episode titles as of January 2015 with "hypothesis" used the most at five times followed by "excitation", "insufficiency", "reaction", "turbulence" and "vortex", four times each.

As of Febuary 5, 2015, 173 episodes have been aired.