Air-time legends: the longest-running TV series ever
'The Big Bang Theory' will end an epic run with its 12th season
The word is out: 'The Big Bang Theory' is set to go out with a bang after its 12th and last season has just been announced. The news has sealed the show's reputation as the longest-running multi-camera sitcom in the history of television, but it's certainly not the only record-holding series out there.
Click through this gallery to see the world's longest-running TV shows.
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