The Adventures of Sherlock HolmesChapter 7
Five Orange Pips Tragedy
John Openshaw seeks protection from Ku Klux Klan warnings marked 'K.K.K.' after his uncle and father's suspicious deaths. Holmes traces the threat to the ship Lone Star but Openshaw drowns near Waterloo Bridge before countermeasures.
Outcome
Openshaw dies; Holmes sends mocking pips to perpetrators, but their ship vanishes at sea, leaving the case unresolved.