Frogstar Fighters are antagonists in the Hitchhiker's Guide to the Galaxy book The Restaurant at the End of the Universe. They are employed by the Galactic Government to track down Zaphod Beeblebrox. The Fighters are manned spacecraft and employ unmanned spacecraft to infiltrate buildings. The Fighters are gray in the real Universe. They also attack the offices of The Hitchhiker's Guide to the Galaxy and steal the whole tower block with Zaphod in it. The Fighters take Zaphod to Frogstar, the most evil planet in the Galaxy.