Whole walking along the banks of the River Thames, Watson finds a diamond tooth. The article takes on more meaning later, however, when Holmes learns that the body of a murder victim had been discovered near where Watson found the tooth.

Directors: Steve Previn, Sheldon Reynolds, Jack Gage
Writers: Harold Jack Bloom, Arthur Conan Doyle, Charles Early
Starring: Ronald Howard, Howard Marion-Crawford, Archie Duncan, Richard Larke