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| title | chunk | source | category | tags | date_saved | instance |
|---|---|---|---|---|---|---|
| The Big Bang Theory | 5/11 | https://en.wikipedia.org/wiki/The_Big_Bang_Theory | reference | science, encyclopedia | 2026-05-05T04:04:29.021226+00:00 | kb-cron |
The four main male characters are all avid fans of nerd culture. Among their shared interests are science fiction, fantasy, comic books, and collecting memorabilia. Star Trek in particular is referred to frequently, and Sheldon identifies strongly with the character of Spock, so much so that when he is given a used napkin signed by Leonard Nimoy as a Christmas gift from Penny, he is overwhelmed with excitement and gratitude ("I possess the DNA of Leonard Nimoy?!"). Star Trek: The Original Series cast members William Shatner and George Takei have made guest appearances, and Leonard Nimoy made a guest appearance as the voice of Sheldon's vintage Mr. Spock action figure. Star Trek: The Next Generation cast members Brent Spiner and LeVar Burton have had guest appearances as themselves, while Wil Wheaton has a recurring role as a fictionalized version of himself. Leonard and Sheldon have had conversations in Klingon. They are also fans of Star Wars, Battlestar Galactica, and Doctor Who. James Earl Jones, Carrie Fisher and Mark Hamill made guest appearances. In the episode "The Ornithophobia Diffusion", when there is a delay in watching Star Wars on Blu-ray, Howard complains, "If we don't start soon, George Lucas is going to change it again" (referring to Lucas' controversial alterations to the films). In "The Hot Troll Deviation", Katee Sackhoff of Battlestar Galactica appeared as Howard's fantasy dream girl. The characters have different tastes in franchises, with Sheldon praising Firefly but disapproving of Leonard's enjoyment of Babylon 5. With regard to fantasy, the four make frequent references to The Lord of the Rings and Harry Potter novels and movies. Additionally, Howard can speak Sindarin, one of the two Elvish languages from The Lord of the Rings. Wednesday night is the group's designated "comic book night" because that is the day of the week when new comic books are released. The comic book store is run by fellow geek and recurring character Stuart. On a number of occasions, the group members have dressed up as pop culture characters, including The Flash, Aquaman, Frodo Baggins, Superman, Batman, Spock, The Doctor, Green Lantern, and Thor. As a consequence of losing a bet to Stuart and Wil Wheaton, the group members are forced to visit the comic book store dressed as Catwoman, Wonder Woman, Batgirl, and Supergirl. DC Comics announced that, to promote its comics, the company would sponsor Sheldon wearing Green Lantern T-shirts. Various games have been featured, as well as referred to, on the series (e.g. World of Warcraft, Halo, Mario, Donkey Kong, etc.), including fictional games like Mystic Warlords of Ka'a (which became a reality in 2011) and Rock-paper-scissors-lizard-Spock.