Examining The Doctor returns to its regular commentary track format with Part Two of the lost William Hartnell story Galaxy 4, “Trap Of Steel”.

The Doctor and Steven learn about the imminent destruction of the entire planet. He and Vicki are then tasked with seeking out the mysterious Rills while Steven is left in the custody of the Drahvin leader, Maaga. Are The Rills as dangerous as she claims? Or could treachery be afoot?

Galaxy 4 at https://tardis.fandom.com/wiki/Galaxy_4_(TV_story)

The actual scripts still exist https://broadwcast.org/index.php/Galaxy_4

https://www.shannonsullivan.com/drwho/serials/t.html

Internet Archive link https://archive.org/details/dr_who_galaxy_four