I haven't watched it yet, but the list of participants is interesting. From the description:
We once shared the planet with Neanderthals and other human species. Some of our relatives may have had tools, language and culture. Why did we thrive while they perished? Join evolutionary biologists, geneticists and anthropologists as they share profound insights about the origin of man and retrace our singular journey from fledgling prototype to the most dominant species on Earth.I'll update this entry if I notice anything novel said in the program.