Original sentence: See Doctor Who audio releases.See Doctor Who missing episodes.The BBC no longer holds the serial in its archives, having been wiped while negotiations were ongoing with BBC for the story to be shown at a convention.The Drahvins try to enlist the Doctor's help to destroy the "evil" Rills, but who are the real villains.The only remaining visual record of this story consists of about six minutes of footage from Episode 1 and several publicity photographs.The ratings for this story ranged from 9 million viewers for Episode 1 and a peak of 11.3 million viewers for Episode 3.The soundtrack for the serial is intact and has been released commercially, with linking narration provided by Peter Purves
Edited sentence: All four stories were lost when they were to be shown at a convention.But who are the realvillains on the planet.The BBC no longer holds the serial in its archives.The Drahvins try to enlist the Doctor's help to destroy the "evil" Rills.This is a shame, as it was the best episode of season 3, with 9.9 million viewers every week.While in negotiation with the BBC, someone went in and erased all 4 tapes for new stories.While the video (except 6 minutes of episode 1 and snapshots) will be lost forever, the soundtracks to these episodes exist and have been released commercially, with linking narration provided by Peter Purves