A Look-Back At Every Character In The Big Bang Theory. Who Is Your Favorite?

Bill Nye as Himself

2013 is when the one and only Bill Nye guest-starred on The Big Bang Theory in the episode “The Proton Displacement.” Although to many of us, he will always be “Bill Nye the Science Guy.” Nye, like a Jack of all trades, also works as a science communicator, television presenter, and mechanical engineer.

Bill Nye As Himself

Carrie Fisher as Herself

Though it’s a bittersweet feeling to see Carrie Fisher on this list, Princess Lea is always a fan favorite no matter the role she’s playing. The actress, writer, and humorist appeared in the 2014 episode “The Convention Conundrum”.

Carrie Fisher As Herself