A novelisation of this serial, written by William Emms, was published by Target Books in November 1985, entitled Galaxy Four.
The script of this serial was published by Titan Books in July 1994, edited by John McElroy, here entitled Galaxy 4. At the time of printing, the only audio recording known to exist was a poor quality copy of the second episode "Trap of Steel" which had several parts completely inaudible.
All the existing audio-visual material for this story was released on VHS in 1998 as part of the documentary The Missing Years.
The same material was released on DVD in 2004 as part of the Lost in Time box set. The newly rediscovered episode 3, "Air Lock", was released on 11 March 2013 as an extra on The Aztecs - Special Edition DVD. Along with the episode, a reconstruction of the other 3 episodes, which had been originally prepared for the DVD of The Time Meddler, was included, with surviving clips and photographs.
The soundtrack for the serial is intact and was released commercially in 2002, with linking narration provided by Peter Purves.
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