Fan fiction or fanfiction (also abbreviated to fan fic, fanfic or fic) is fiction about characters or settings from an original work of fiction, created by fans of that work rather than by its creator. It is a popular form of fan labor, particularly since the advent of the internet. The first big fan fiction topic was Star Trek. Both Sheldon and Amy have written fanfiction.
In "The Thespian Catalyst", Sheldon and Penny practice improv to improve Sheldon's teaching skills by acting out a script that Sheldon wrote based upon a fan fiction story when he was ten years old; "Where No Sheldon Has Gone Before." Penny takes the role of Mr. Spock, saying Sheldon needs to be out of his comfort zone so Sheldon plays his mother who is sending him off to the 23rd century at the request of Mr. Spock, who says that he is the best hope to bring peace to a vast and troubled galaxy. Eventually the script brings out very emotional feelings from Sheldon. He cries because in the play he doesn't want to get taken away. Penny calls his mother to help him settle down: "Hi, Mrs Cooper. It's Penny. Yeah, I think I broke your son". Then she has Sheldon talk to his mother, who begs her not to let Spock take him to the future.
In "The Troll Manifestation", after Amy and Penny watched an embarrassing video of Bernadette, she blurts out that Amy writes "Little House on the Prairie" fan fiction that includes herself and Sheldon and post it on-line. Amy wants to know what she did to deserve that. Bernadette replies that tearing down other women was part of he pageant training. Amy insists that it's personal so Penny concludes that its about her and Sheldon. That is not true. Her story is about a physicist named Cooper travelling back in time and meeting a pioneer woman named Amelia. Penny quickly finds it and starts to read as Bernadette listens carefully. The girls quickly become engrossed by the story, Penny later reads it to Leonard, but he gets weirded out and goes to sleep.
- Both examples of fanfiction in the show had the writer create an alternative version of themselves.
- Amelia and the Time-traveler named Coop is a reference to Amy Pond and the Doctor from Doctor Who.
- Amy writes "Little House on the Prairie" fan fiction stories though none of the actual characters from the show appear in it. Second episode to reveal that a character previously wrote fan fiction. First was "The Thespian Catalyst"
- Alternate fan episodes have been added to the wikia.