It's official - 3 more seasons

[SpaceAnJL]

Good point. But at least CO was cute.

Just found this. Doesn't fit every show but it perfectly fits TBBT except I would argue that the crackup began in season 5, mainly because of AFF's influence: Lifespan of every TV show ever

Holy Crap. Yes. Though BBT condensed the plateau period into S3, and went straight to the S6 Cracks'n'Crash. I say that the moment her glum little face mooned onto the screen, you could hear the death-knell.