Editing Mostly Harmless (section)

===Radio===
[[Dirk Maggs]] adapted the book as the "[[The Hitchhiker's Guide to the Galaxy Tertiary to Quintessential Phases#The Quintessential Phase|Quintessential Phase]]" of the radio series, and it was broadcast in June 2005. The radio version has an entirely new, upbeat ending, appended to the existing story.

In the alternate ending, after the destruction of Earth, the description of the Babel fish from the earlier series is replayed with an additional section, which states that dolphins and Babel fish are acquainted, and that the dolphins' ability to travel through possibility space (first mentioned in ''[[The Hitchhiker's Guide to the Galaxy (novel)|The Hitchhiker's Guide to the Galaxy]]'' and elaborated on in ''So Long, and Thanks for All the Fish'') is shared by the Babel fish as well. During the ending, Ford explains that the dolphins got taught this skill from the Babel fish in exchange for knowing a good place to have parties. All the major characters are carrying Babel fish in their ears, which rescue them at the moment of Earth's destruction by transporting them to the Restaurant at the End of the Universe. It's also revealed that Fenchurch was transported here when she vanished and has been patiently waiting for Arthur to show up.  The characters are reunited with [[Marvin the Paranoid Android|Marvin]], and it is revealed that beyond the Restaurant (and beyond the car park in which Marvin works) lies an endless series of blue lagoons&nbsp;— the final destination of the dolphins. The series ends with Arthur asking Fenchurch, "Will you come flying with me?", and her reply, "Always."

The version released on CD contains an even longer set of alternate endings, including one set after the events of the twelfth radio episode (with Arthur Dent and Lintilla), and on an alternate Earth where Arthur Dent and Fenchurch engage together in a stand-off against Mr. Prosser.