I'm watching TV also. Don't worry about that.
When The Revolution comes on The History Channel I'll pay attention to that. A very well done series.
Remember that Hancock is not suggesting "contact." He is suggesting that all of these cultures developed independently from the wreckage of an earlier culture ( the Remote Common Ancestor.)
That idea is compelling but as you will see, Hancock gets off on a tangent with the Hapgood Earth Crust Displacement theory and he never gets back on track.