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All 12 seasons of The Big Bang Theory are available to stream and download on Netflix now. The series featured iconic guest stars and cameo appearances from the worlds of entertainment and science. Express.co.uk has everything you need to know.
The Top 5 Guest stars and cameos on The Big Bang Theory
English theoretical scientist, physicist and cosmologist Stephen Hawking made several iconic appearances in The Big Bang theory.
Hawking made his Big Bang Theory debut in the season five episode, The Hawking Excitation.
In the episode, Howard Wolowitz (played by Simon Helberg) was tasked with watching Hawking’s wheelchair during a guest lecture.
Sheldon Cooper (Jim Parsons) took the opportunity to show Hawking one of his papers and he ended up correcting one of his mistakes.
In total, Hawking made six guest appearances during The Big Bang Theory and also featured over video calls as Sheldon’s rival.
Sadly, Hawkings died in March 2018 and the show made an emotional tribute to the late scientist.
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Marvel Comics mastermind Stan Lee made a cameo appearance in season three of The Big Bang Theory.
Lee, who had co-created numerous popular fictional characters, including superheroes Spider-Man, the X-Men, Iron Man, Thor, the Hulk, Black Widow, the Fantastic Four, Black Panther, Daredevil, Doctor Strange, Scarlet Witch and Ant-Man, starred in the episode titled The Excelsior Acquisition.
In the episode, Sheldon and Penny (Kaley Cuoco) turned up at his home unexpectedly and uninvited.
Lee answered the door wearing only a Fantastic Four dressing down and was outraged, getting a restraining order against the pair.
Carrie Fisher, Mark Hamill and James Earl Jones
Three of the greatest Star War legends made cameo appearances in The Big Bang Theory.
Fisher and Jones starred in the same episode in 2014.
In the season seven episode titled, The Convention Conundrum, Sheldon and Jones met after the scientist was not allowed entry to Comic-Con.
The pair became close friends and spent the entire day together, going to a theme park, singing karaoke and going to a sauna together.
At the end of their day, Jones and Sheldon decided to play “doorbell ditch” on Carrie Fisher.
After ringing her doorbell and running away, Fisher emerged from her home with a baseball bat ready to attack the pair.
Mark Hamill appeared separately in the season 11 episode The Bow Tie Asymmetry The Big Bang Theory.
When Howard returned a lost dog to its owner who happened to belong to Hamill, the actor offered Howard a favour as a show of gratitude.
Howard asked Hamill to officiate Sheldon and Amy Farrah Fowler’s (Mayim Bialik) wedding and surprisingly, he said yes.
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American stand up comedian and actor Bob Newhart guest-starred in The Big Bang Theory in 2013.
Newhart starred in five episodes of The Big Bang Theory in total Arthur Jeffries/Professor Proton.
Arthur was an idol of Sheldon and Leonard Hofstadter’s (Johnny Galecki) from their childhood, having hosted the children’s science televisions how as Professor Proton.
When Arthur died in the series, he returned as a ghost in his dreams whenever Sheldon needed support.
For his performance as Professor Proton, Newhart won a Primetime Emmy Award for Best Guest Actor in a Comedy Series.
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Buffy the Vampire’s Eliza Dushku guest-starred in season four of The Big Bang Theory in 2010.
She appeared in The Apology Insufficiency as FBI Special Agent Page.
Special Agent Angela Page, carried out a background check on Howard for his security clearance to be on the Defense Department Laser Equipped Surveillance Satellite team.
Speaking to TV Guide ahead of her appearance in the show, Dushku said: “I am a fan, but I have to be honest.
“I Wikipedia-ed each of their characters to see things that have been revealed and things that might be in their file so I would get lines that I wouldn’t have made the connection to because I haven’t watched every single episode.
“When they said little things, I could raise an eyebrow or have a light bulb go off.
“Wikipedia has such an intense rundown on all the characters and all the actors. I mean, I really felt like I could go in as an FBI agent who had all my information on them.”
Other famous faces include Bill Nye, Buzz Aldrin, Kevin Smith, Joe Manganiello, Adam West, George Takei, Katee Sackhoff, Steve Wozniak, LeVar Burton and Will Wheaton, to name a few.
The Big Bang Theory is streaming on Netflix now
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