Bill Nye – Himself
Bill Nye was featured in the 2013 episode of The Big Bang Theory – The Proton Displacement – as a guest star. We could somehow agree that this is one of the greatest guest appearances on the show. However, many other guest stars have graced the scene in one episode or another.
For the world, Bill is seen as “Bill Nye the Science Guy,” and we can tell he will have that name for a long time to come. Off the screen, Nye is a science communicator, mechanical engineer, and television presenter.
Carrie Fisher – Herself
We can say the appearance of the great Carrie Fisher is a bittersweet one for all of us on The Big Bang Theory. She made a single appearance in 2014 in the episode “The Convention Conundrum,” and we can say it was an impactful one.
But aside from her appearance in that episode, she was more famous for her other roles in films such as Star Wars as Princess Lia. The star was a writer, actress, and humorist but died in 2014. Her memories will live on forever.