World renowned physicist and The Simpsons guest star Stephen Hawking has died at the age of 76.
Stephen Hawking made several appearances on the show, voicing himself via his voice synthesizer. He also made an appearance in The Simpsons: Tapped Out as a playable character.
In 1963, Hawking was only given a few years to live due to his amyotrophic lateral sclerosis, which gradually paralyzed him over years and could only communicate via a voice synthesizer. He passed away peacefully in his home in Cambridge on March 14th.
Hawking first guest starred on the show in the season 10 episode “They Saved Lisa’s Brain“. His daughter, Lucy Hawking, knew one of the scriptwriters for The Simpsons who was interested in writing an episode involving Stephen Hawking, and she convinced him to guest star.