Timeline of The Hitchhiker's Guide to the Galaxy versions

This timeline shows the dates (and order of release) of all of the various media relating to Douglas Adams' The Hitchhiker's Guide to the Galaxy series. Where multiple releases/broadcasts occurred, the first one is given.

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 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, 2008		Stage show	Live reading of Fit the Second (by the original cast) at the 6th Douglas Adams Memorial Lecture.
October 11, 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"