| Date
|
Medium
|
Title
|
| March 8 – April 12, 1978
|
|
Radio series
|
Primary Phase: "Fit the First" to "Fit the Sixth"
|
| December 24, 1978
|
|
Radio series
|
Christmas Special, which became Secondary Phase: "Fit the Seventh"
|
| May 1–9, 1979
|
|
Stage show
|
The Hitchhiker's Guide to the Galaxy (ICA)
|
| 1979
|
|
Record
|
The Hitchhiker's Guide to the Galaxy
|
| October 1979
|
|
Novel
|
The Hitchhiker's Guide to the Galaxy
|
| January 21–25, 1980
|
|
Radio series
|
Secondary Phase: "Fit the Eighth" to "Fit the Twelfth"
|
| January 15 – February 23, 1980
|
|
Stage show
|
The Hitchhiker's Guide to the Galaxy (Theatr Clwyd)
|
| 1980
|
|
Record
|
The Hitchhiker's Guide to the Galaxy Part Two: The Restaurant at the End of the Universe
|
| October, 1980
|
|
Novel
|
The Restaurant at the End of the Universe
|
| July 13 – August 2[1] 1980
|
|
Stage show
|
The Hitchhiker's Guide to the Galaxy (Rainbow)
|
| January 5 – February 9, 1981
|
|
TV series
|
The Hitchhiker's Guide to the Galaxy
|
| 1982
|
|
Novel
|
Life, the Universe and Everything
|
| October 1984
|
|
Computer game
|
The Hitchhiker's Guide to the Galaxy
|
| November 1984
|
|
Novel
|
So Long, and Thanks for All the Fish
|
| 1985
|
|
Radio scripts
|
The Hitchhiker's Guide to the Galaxy: The Original Radio Scripts
|
| 1986
|
|
Short story
|
"Young Zaphod Plays It Safe"
|
| 1992
|
|
Novel
|
Mostly Harmless
|
| May 11, 2001
|
Death of Douglas Adams
|
| September 21 – October 26, 2004
|
|
Radio series
|
Tertiary Phase: "Fit the Thirteenth" to "Fit the Eighteenth"
|
| April 28, 2005
|
|
Film
|
The Hitchhiker's Guide to the Galaxy
|
| May 3–24, 2005
|
|
Radio series
|
Quandary Phase: "Fit the Nineteenth" to "Fit the Twenty-Second"
|
| May 31 – June 21, 2005
|
|
Radio series
|
Quintessential Phase: "Fit the Twenty-Third" to "Fit the Twenty-Sixth"
|
| March 12,[2] 2008
|
|
Stage show
|
Live reading of Fit the Second (by the original cast) at the 6th Douglas Adams Memorial Lecture.
|
| October 11,[3] 2009
|
|
Stage show
|
Hitchhikers Live On Stage! at Hitchcon event for publication of sixth book (below).
|
| October 12, 2009
|
|
Novel
|
And Another Thing..., by Eoin Colfer
|
| June 8 – July 21, 2012
|
|
Stage show
|
The Hitchhiker's Guide to the Galaxy Radio Show Live
|
| September 14 – October 20, 2013
|
|
Stage show
|
The Hitchhiker's Guide to the Galaxy Radio Show Live (Planned to run to November 30, the show closed early.)
|
| March 29, 2014
|
|
Radio show
|
The Hitchhiker's Guide to the Galaxy, a live radio broadcast in front of an audience as part of Radio 4's Character Invasion Day
|
| March 8 – April 12, 2018
|
|
Radio series
|
Hexagonal Phase: "Fit the Twenty-Seventh" to "Fit the Thirty-Second"
|
