Considering the proclivities of its characters, it's no surprise that The Big Bang Theory saw lots of sci-fi icons make guest appearances on the show. While many of Big Bang Theory's detractors would argue that the show spent more time laughing at nerds and geeks than with them, there's no arguing just how incredibly popular the show became, reigning as TV's top-rated comedy for most of its 12-season run on CBS.
Read more on screenrant.com