![Actress Kaley Cuoco (L) and writer/producer/actor Stan Lee arrive at CBS's 'The Big Bang Theory' Celebrates 200th Episode at Vibiana on February 20, 2016 in Los Angeles, California. Photo Ents Images/OIC 0203 Actress Kaley Cuoco (L) and writer/producer/actor Stan Lee arrive at CBS's 'The Big Bang Theory' Celebrates 200th Episode at Vibiana on February 20, 2016 in Los Angeles, California. Photo Ents Images/OIC 0203](https://c8.alamy.com/comp/2MR0BAC/actress-kaley-cuoco-l-and-writerproduceractor-stan-lee-arrive-at-cbss-the-big-bang-theory-celebrates-200th-episode-at-vibiana-on-february-20-2016-in-los-angeles-california-photo-ents-imagesoic-0203-174-1069-2MR0BAC.jpg)
Actress Kaley Cuoco (L) and writer/producer/actor Stan Lee arrive at CBS's 'The Big Bang Theory' Celebrates 200th Episode at Vibiana on February 20, 2016 in Los Angeles, California. Photo Ents Images/OIC 0203
![The Big Bang Theory Cast (Jim Parsons, Johnny Galecki, Kaley Cuoco, Simon Helberg, Kunal Nayaar) with guest stars Stan Lee, Leonard Nimoy, and Steve Wozniak The Big Bang Theory Cast (Jim Parsons, Johnny Galecki, Kaley Cuoco, Simon Helberg, Kunal Nayaar) with guest stars Stan Lee, Leonard Nimoy, and Steve Wozniak](https://i.pinimg.com/originals/eb/f6/8c/ebf68cbcd492c2a52f3d046296bc2c68.jpg)
The Big Bang Theory Cast (Jim Parsons, Johnny Galecki, Kaley Cuoco, Simon Helberg, Kunal Nayaar) with guest stars Stan Lee, Leonard Nimoy, and Steve Wozniak
![The Big Bang Theory Cast with Stan Lee Getting Kissed by Penny 8 x 10 Photo at Amazon's Entertainment Collectibles Store The Big Bang Theory Cast with Stan Lee Getting Kissed by Penny 8 x 10 Photo at Amazon's Entertainment Collectibles Store](https://m.media-amazon.com/images/I/81PGdJVxZuL.jpg)
The Big Bang Theory Cast with Stan Lee Getting Kissed by Penny 8 x 10 Photo at Amazon's Entertainment Collectibles Store
![The Big Bang Theory 200th episode: Every celebrity cameo, including Adam West and Sara Gilbert | The Independent | The Independent The Big Bang Theory 200th episode: Every celebrity cameo, including Adam West and Sara Gilbert | The Independent | The Independent](https://static.independent.co.uk/s3fs-public/thumbnails/image/2015/12/23/11/Big-Bang.jpg)