was acclaimed by critics. Although they generally disliked the episode, Martyn and Wood wrote that Hawking's cameo "saves [the episode] from being very boring". Plath called the performance "very funny", while Jane described it as "great". Hawking reached seventh place in UGO's list of The Simpsons "Top 11 Guest Stars", and finished in fourteenth place in "The Simpsons 20 best guest voices of all time" by Ryan Stewart of The Boston Phoenix. Stewart wrote that Hawking's line ""Your theory of a doughnut-shaped universe intrigues me, Homer. I may have to steal it" was a "memorable" quote from the episode. Ethan Alter of The Morning Call described Hawking's cameo as one of the series' ten best, and wrote that Hawking's best line in the episode was "I wanted to see your Utopia, but now I see it is more of a Fruitopia." Writing for IGN, Eric Goldman, Dan Iverson and Brian Zoromski placed Hawking at number sixteen on their list "Top 25 Simpsons Guest Appearances". They wrote that he had a "fairly major" role in the episode, and that he had "several great lines". Hawking's response After the episode aired, Hawking told the Simpsons staff that he "loved" all the jokes and in an interview with The Guardian in 2005, he stated that his guest appearances on The Simpsons were "great fun". An action figure based on Hawking's appearance in The Simpsons has been produced, with the figurine's computer screen reading "If you're looking for trouble, you've found it", a line from "They Saved Lisa's Brain". Since "They Saved Lisa's Brain", Hawking has guest-starred three times on The Simpsons. In 2005, he appeared in the season 16 episode "Don't Fear the Roofer"; in 2007, he starred in the season 18 episode "Stop or My Dog Will Shoot"; and in 2010, he appeared in the Season 22 premiere "Elementary School Musical". However, Hawking has also expressed dissatisfaction regarding the impact on his notoriety caused by his appearance in the episode. In a debate with physicist Brian Cox in The Guardian, Hawking was asked what the most common misconception about his work was. He replied, "People think I'm a Simpsons character." Writing for The Daily Telegraph, Peter Hutchison argued that Hawking "feels he is sometimes not properly recognised for his contribution to our understanding of the universe." In his book The book is dead: long live the book, Sherman Young wrote that most