Ford Prefect is a fictional character in The Hitchhiker's Guide to the Galaxy by the British author Douglas Adams. His role as Arthur Dent's friend – and rescuer, when the Earth is unexpectedly demolished to make way for a hyperspace bypass at the start of the story – is often expository, as Ford is an experienced galactic hitchhiker and explains that he is actually an alien journalist, a field researcher for the titular Guide itself, and not an out-of-work actor from Guildford as he had hitherto claimed.

Zaphod Beeblebrox is a fictional character in the various versions of the comic science fiction series The Hitchhiker's Guide to the Galaxy by Douglas Adams.