A little known fact about US TV (or, Why you don't exist)

Since American TV shows love doing crossover episodes, it becomes apparent that if St. Elsewhere and Homicide: Life on the Street both exist in the same TV universe, so do many other TV programs. Nerds on the internet have established a network of over 280 shows (and counting) which all coexist, implied by crossovers, cameos or references - and when we delve deeper, some interesting facts can be deduced...

http://home.vicnet.net.au/~kwgow...
(a full nerdy catalogue of crossovers, accurate c.2006)

http://en.wikipedia.org/wiki/Tom...
(down the rabbit-hole...)