Back in 1937, Mr. Morley had both his residence and his dental practice in the same building, which he owned. The tragic events that came to be known as the "One, Two, Buckle My Shoe" murder case began on the front stoop of 168 Harley Street, and two of the three murders were committed there. And Belgian detective Hercule 'Poirot' was present when those tragic events were set in motion.
"168" can be considered one of "The Numbers" from the series 'Lost', as it can be seen as a combination of "16" and "8".
Ah, ze little grey cells! Zey are at work even for me, ze new Baron of Greymatter!