 All of the episodes, except "Tomkinson's Schooldays" and "Murder at Moorstones Manor", have optional laugh-free soundtracks.The DVD set also includes the only surviving (and rather poor quality) recording of Palin and Jones's comic BBC play "Secrets" from 1973, as well as a documentary by Michael Palin entitled "Comic Roots" in which he goes back to visit his home town.Not linked in the menu are scans of the first drafts of the scripts for six episodes ("Tomkinson's Schooldays", "The Testing of Eric Olthwaite", "Murder at Moorstone Manor", "Across the Andes by Frog", "The Curse of the Claw" and "Whinfrey's Last Case"), type-written with Palin's handwritten comments and changes in the margin.