The first half of my reconstruction of this missing episode, made using stills, video clips and the surviving soundtrack.
Well, I say "my"... Due to the lack of John Cura tele-snaps, many of the images I've used are composites and CGI from Loose Cannon's excellent reconstruction. However, I have made some modifications, including a few new clips and an improved soundtrack, brilliantly remastered by Mark Ayres.
I have the soundtrack in two forms, narrated (by Peter Purves) and non-narrated. I have combined the two so that the narration is present only where I deem it necessary.
In case you're wondering - no, I don't know why this episode is called Coronas of the Sun! Perhaps it has something to do with the glow of the mineral taranium, an aspect that is emphasised in the narration.
The picture quality varies, so I wouldn't recommend watching this full screen!
The complete soundtrack is available on CD from BBC Audio. Support the BBC releases.