I still have my old comics collection of the original Crisis on Infinite Earths ... they have included all of the key characters in the original comics - I may have to read the comics again to see the deviations, but from what I remembered it pretty much ended when the Flash destroyed the machine of the Anti-Monitor and have all the remaining earths of the multi-verse combined into one ... the good thing I've seen on the tv series so far is the collection of all the other DC characters from different shows and even the older ones (Lucifer, Smallville, the original Flash, and probably some more coming soon) ... nothing beats the original story on comics, but the tv series is going well so far