VHS and DVD Releases
The original 625 line PAL videotapes of episodes two and three were wiped/destroyed, although some scenes from episode two were found to have survived on an unedited studio-recording block. In 1982 525 line NTSC copies were returned from Canada.
In May 1992, the story was released on VHS. On 25 April 2005, the story was released on Region 2 DVD, followed by a Region 1 release on 8 November 2005. For remastering purposes the NTSC material was converted back to PAL using Reverse Standards Conversion. In episode two, PAL footage from the studio recording was inserted wherever possible, although this does result in some noticeable shifts in picture sharpness between scenes. As of 15 October 2008, this serial has been included for sale on iTunes.
On 22 October 2012 a Special Edition DVD was released featuring much improved picture restoration (especially of episodes 2 and 3). The quality of the NTSC material was improved by combining the colour from the Reverse Standards Conversion with geometrically-corrected picture information from the remastered black and white film recordings, and then applying VidFIRE to restore the smooth 'video look'. The Special Edition adds various new 'extras', including the complete, unedited version of the surviving studio recording.
Read more about this topic: The Claws Of Axos
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