Hello, the Historian here, bringing you bad news. It seems the person who dubbed our Loose Cannon reconstruction of "Marco Polo" (an official dubber, I hasten to add) accidently left episode six off! The first tape ends with five, the second begins with seven. There is a summary of the episode's events on this page (scroll down), and the transcription (which I will certainly be reading!) is here. For completeness sake, I should add that the episode was aired on 28 March, 1964.
Obviously, this is a serious disappointment to the TARDIS Project team. We did continue on with the next episode, which I'll get to in a moment, but I just thought I should apologize to our readers...whoever you are.
In a moment, "Assassin at Peking." And I remain