http://6thfloor.blogs.nytimes.com/2013/05/30/the-big-bang-theory-and-the-mary-tyler-moore-show-a-comparison/

Turns out "MTM" characters have "Big Bang" doubles.
Read more at http://www.hitfix.com/tv-tattle#fyw4eDlUI0OWVeA4.99

wow, every single one of those comparisons is such a stretch and completely unrealistic that it is not worth mentioning.