Degrees of St. Elsewhere
Tommy Westphall is the autistic kid who imagined the entire TV series St. Elsewhere. Tommy Westphall’s Mind shows how the fictional universes of over 280 series are connected to St. Elsewhere through crossovers, and hence all figments of Tommy’s imagination.
In case you were wondering how St. Elsewhere is connected to LOST:
St. Elsewhere > Cheers > Frasier > Caroline in the City > Friends > Mad About You > Dick Van Dyke Show > Danny Thomas Show > Make Room for Grandaddy > Here’s Lucy > Mannix > Diagnosis Murder > LOST
Apparently LOST’s Oceanic Airlines popped up on a bunch of shows over the years, including JAG, Diagnosis Murder, The War at Home, and Alias.
Read the full explanation (PDF) here
(thx @ericrey)