Sadly, The Big Bang Theory's series finale is almost upon us... We can't help but feel sad to see one of our favorite sitcoms come to end, but thankfully, the producers of the show decided to throw in a few very special guest stars to spice up the very last season of this scientifically hilarious sitcom! To find out who our lucky guest stars are, check out the video for more! 

Looks like the the producers have some cool guest stars in store for the last season of The Big Bang Theory!