|Within various Publications
|"The Day the Earth Stood Stupid" (3ACV07)
A mental realm is any fictional universe containing associated characters, events and locations. The Brainspawn are capable of accessing mental realms through publications such as books and comics that describe them. An invention of Professor Farnsworth is capable of extracting characters from these realms.
- Herman Melville's Moby Dick
- Mark Twain's The Adventures of Tom Sawyer
- Jane Austen's Pride and Prejudice
- Philip J. Fry's Fry Tricks The Brain
- Ian Boothby's Simpsons comic #87 Hail to the Cat